Details of a Researcher

Papers - KOSAKA Hideo

about 114

Electrochemical Deposition of Indium for Scalable 3D Quantum Chiplets

J. A. Goundar, L. T. Ngoc Mai, M. Yuki, O. Yugi, H. Kosaka and F. Inoue

2024 International 3D Systems Integration Conference (3DIC), Sendai, Japan 2025.1 [Reviewed]

DOI

Language：English Publishing type：Research paper (scientific journal) Joint Work

Coherent Electric-Field Control of Orbital State in a Neutral Nitrogen-Vacancy Center

Hodaka Kurokawa, Keidai Wakamatsu, Shintaro Nakazato, Toshiharu Makino, Hiromitsu Kato, Yuhei Sekig … Show more authors

Nature Communications 15 ( 1 ) 2024.5 [Reviewed]

DOI Web of Science PubMed

Language：English Publishing type：Research paper (scientific journal) Single Work

Coherent electric field control of orbital state of a neutral nitrogen-vacancy center

Kurokawa Hodaka, Wakamatsu Keidai, Nakazato Shintaro, Makino Toshiharu, Kato Hiromitsu, Sekiguchi Y … Show more authors

Nature Communications 15 2024.5

CiNii Research

Language：English Publishing type：Research paper (scientific journal) Publisher：Springer nature Joint Work

The coherent control of the orbital state is crucial for realizing the extremely-low power manipulation of the color centers in diamonds. Herein, a neutrally-charged nitrogen-vacancy center, NV0, is proposed as an ideal system for orbital control using electric fields. The electric susceptibility in the ground state of NV0 is estimated, and found to be comparable to that in the excited state of NV−. Also, the coherent control of the orbital states of NV0 is demonstrated. The required power for orbital control is three orders of magnitude smaller than that for spin control, highlighting the potential for interfacing a superconducting qubit operated in a dilution refrigerator.

Low-Temperature Characteristics of an AlN/Diamond surface acoustic wave resonator

Moyuki Yamamoto, Hodaka Kurokawa, Satoshi Fujii, Toshiharu Makino, Hiromitsu Kato, and Hideo Kosaka

Journal of Applied Physics 134 ( 21 ) 2023.12 [Reviewed]

DOI Web of Science CiNii Research

Language：English Publishing type：Research paper (scientific journal) Publisher：American Institute of Physics Single Work

Phonons confined in mechanical resonators can be coupled to a variety of quantum systems and are expected to be applied to hybrid quantum systems. Diamond surface acoustic wave (SAW) devices are capable of high efficiency in phonon interaction with color centers in diamond. The temperature dependence of the quality factor is crucial for inferring the governing mechanism of coupling efficiency between phonons and color centers in diamond. In this paper, we report on the temperature dependence of the quality factor of an AlN/diamond SAW device from room temperature to 5 K. The temperature dependence of the quality factor and resonant frequency suggests that the mechanism of SAW dissipation in the AlN/diamond SAW resonator at 5 GHz is the phonon–phonon scattering in the Akheiser regime and that further cooling can be expected to improve the quality factor. This result provides a crucial guideline for the future design of AlN/diamond SAW devices.

Deterministic Bell state measurement with a single quantum memory

Kamimaki Akira, Wakamatsu Keidai, Mikata Kosuke, Sekiguchi Yuhei, Kosaka Hideo

npj Quantum Information 9 2023.10

CiNii Research

Language：English Publishing type：Research paper (scientific journal) Publisher：Springer Nature Joint Work

Entanglements serve as a resource for any quantum information system and are deterministically generated or swapped by a joint measurement called complete Bell state measurement (BSM). The determinism arises from a quantum nondemolition measurement of two coupled qubits with the help of readout ancilla, which inevitably requires extra physical qubits. We here demonstrate a deterministic and complete BSM with only a nitrogen atom in a nitrogen-vacancy (NV) center in diamond as a quantum memory without relying on any carbon isotopes, which are the extra qubits, by exploiting electron‒nitrogen (14N) double qutrits at a zero magnetic field. The degenerate logical qubits within the subspace of qutrits on the electron and nitrogen spins are holonomically controlled by arbitrarily polarized microwave and radiofrequency pulses via zero-field-split states as the ancilla, thus enabling the complete BSM deterministically. Since the system works under an isotope-free and field-free environment, the demonstration paves the way to realize high-fidelity quantum repeaters for long-haul quantum networks and quantum interfaces for large-scale distributed quantum computers.

Diamond optomechanical cavity with a color center for coherent microwave-to-optical quantum interfaces

Kim, B; Kurokawa, H; Sakai, K; Koshino, K; Kosaka, H; Nomura, M

PHYSICAL REVIEW APPLIED 20 ( 4 ) 2023.10

DOI Web of Science

Language：The in addition, foreign language Publishing type：Research paper (scientific journal) Joint Work

Diamond optomechanical cavity with a color center for coherent microwave-to-optical quantum interfaces

Kim Byunggi, Kurokawa Hodaka, Sakai Katsuta, Kosaka Hideo, Nomura Masahiro

PHYSICAL REVIEW APPLIED 20 ( 4 ) 2023.10

CiNii Research

Language：English Publishing type：Research paper (scientific journal) Publisher：American Physical Society Joint Work

Quantum transduction between microwave and optical photons plays a key role in quantum communication among remote qubits. Although the quantum transduction schemes generating communication photons have been successfully demonstrated by using optomechanical interfaces, the low conversion efficiency remains an obstacle to the implementation of a quantum network consisting of multiple qubits. Here, we present an efficient quantum transduction scheme using a one-dimensional diamond optomechanical crystal cavity tuned at a color-center emission without optomechanical coupling. The optomechanical crystal cavity incorporates a thin aluminum nitride (AlN) pad piezoelectric coupler near the concentrator cavity region, while retaining ultrasmall mechanical and optical mode volumes of about 1.5×10^−4(Λp)^3 and 0.2(λ/n)^3, respectively. The energy level of a coherent color-center electron is manipulated by a strong mechanical-mode–color-center electron-coupling rate up to 16.4 MHz. In our system, we theoretically predict that the population-conversion efficiency from a single microwave photon into an optical photon can reach 15% combined with current technologies. The coherent conversion efficiency is over 10% with a reasonably pure decay time of T^∗2>10ns. Our results imply that an atomic color center strongly coupled to the optomechanical crystal cavity will offer a highly efficient quantum transduction platform.

Deterministic Bell state measurement with a single quantum memory

Akira Kamimaki, Keidai Wakamatsu, Kosuke Mikata, Yuhei Sekiguchi and Hideo Kosaka

npj Quantum Information 9 ( 1 ) 2023.10 [Reviewed]

DOI Web of Science

Language：English Publishing type：Research paper (scientific journal) Single Work

Remote Entanglement of Superconducting Qubits via Solid-State Spin Quantum

Kurokawa Hodaka, Yamamoto Moyuki, Sekiguchi Yuhei, Kosaka Hideo

PHYSICAL REVIEW APPLIED 18 ( 6 ) 2022.12 [Reviewed]

DOI Web of Science

Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal) Joint Work

Remote Entanglement of Superconducting Qubits via Solid-State Spin Quantum

Kurokawa Hodaka, Yamamoto Moyuki, Sekiguchi Yuhei, Kosaka Hideo

Physical Review Applied 18 ( 6 ) 2022.12

CiNii Research

Language：English Publishing type：Research paper (scientific journal) Publisher：American Physical Society Joint Work

Quantum communication between remote superconducting systems is being studied intensively to increase the number of integrated superconducting qubits and to realize a distributed quantum computer. Since optical photons must be used for communication outside a dilution refrigerator, the direct conversion of microwave photons to optical photons has been widely investigated. However, the direct conversion approach suffers from added photon noise, heating due to a strong optical pump, and the requirement for large cooperativity. Instead, for quantum communication between superconducting qubits, we propose an entanglement distribution scheme using a solid-state spin quantum memory that works as an interface for both microwave and optical photons. The quantum memory enables quantum communication without significant heating inside the refrigerator, in contrast to schemes using high-power optical pumps. Moreover, introducing the quantum memory naturally makes it possible to herald entanglement and parallelization using multiple memories.

Optically addressable universal holonomic quantum gates on diamond spins

Sekiguchi Yuhei, Matsushita Kazuki, Kawasaki Yoshiki, Kosaka Hideo

NATURE PHOTONICS 16 ( 9 ) 662 - + 2022.9 [Reviewed]

DOI Web of Science CiNii Research

Language：English Publishing type：Research paper (scientific journal) Publisher：Springer Science and Business Media {LLC} Joint Work

Microwave-driven holonomic quantum gates on an optically selected electron spin in a nitrogen-vacancy centre in diamond are demonstrated. Optically addressable entanglement is generated between the electron and adjacent nitrogen nuclear spin. The ability to individually control the numerous spins in a solid-state crystal is a promising technology for the development of large-scale quantum processors and memories. A localized laser field offers spatial selectivity for electron spin manipulation through spin-obit coupling, but it has been difficult to simultaneously achieve precise and universal manipulation. Here, we demonstrate microwave-driven holonomic quantum gates on an optically selected electron spin in a nitrogen-vacancy centre in diamond. The electron spin is precisely manipulated with global microwaves tuned to the frequency shift induced by the local optical Stark effect. We show the universality of the operations, including state initialization, preparation, readout and echo. We also generate optically addressable entanglement between the electron and adjacent nitrogen nuclear spin. High-fidelity operations are achieved by applying amplitude-alternating pulses, which are tolerant to fluctuations in microwave intensity and detuning. These techniques enable site-selective quantum teleportation transfer from a photon to a nuclear spin memory, paving the way for the realization of distributed quantum computers and the quantum Internet with large-scale quantum storage.

Complete Bell state measurement of diamond nuclear spins under a complete spatial symmetry at zero magnetic field

Reyes Raustin, Nakazato Takaya, Imaike Nobuaki, Matsuda Kazuyasu, Tsurumoto Kazuya, Sekiguchi Yuhei … Show more authors

APPLIED PHYSICS LETTERS 120 ( 19 ) 2022.5 [Reviewed]

DOI Web of Science CiNii Research

Language：English Publishing type：Research paper (scientific journal) Publisher：AIP Publishing Joint Work

The symmetry of the space where a spin qubit resides plays an essential role in the manipulation of quantum entanglement, which governs the performance of quantum information systems. Application of a magnetic field, which is usually necessary for spin manipulation and readout, inevitably breaks the spatial symmetry to induce competition among quantization axes between internal and external fields, thus limiting the purity of the entanglement. If we could manipulate and readout entanglement under a zero magnetic field, we would be able to avoid the competition among quantization axes to achieve ideally high fidelity. We here demonstrate the complete Bell state measurement, which is a core element of quantum processing, of two carbon nuclear spins in the vicinity of a diamond nitrogen-vacancy center. The demonstration was made possible by holonomic entanglement manipulations based on the geometric phase with a polarized microwave under a zero magnetic field, where the quantization axis is uniquely defined by the hyperfine field. The demonstrated scheme allows high-fidelity entanglement processing even when magnetic fields cannot be applied to the integration of superconducting and spin qubits, thereby paving the way for building fault-tolerant distributed quantum computers and quantum repeater networks.& nbsp;(C) 2022 Author(s).

Quantum error correction of spin quantum memories in diamond under a zero magnetic field

Nakazato Takaya, Reyes Raustin, Imaike Nobuaki, Matsuda Kazuyasu, Tsurumoto Kazuya, Sekiguchi Yuhei … Show more authors

COMMUNICATIONS PHYSICS 5 ( 1 ) 102 2022.4 [Reviewed]

DOI Web of Science CiNii Research

Language：English Publishing type：Research paper (scientific journal) Publisher：Nature Portfolio Joint Work

The efficacy of quantum error correction of spins in a diamond nitrogen-vacancy that uses magnetic fields depends on spin's location in the lattice. Here, an alternative, zero-field approach relying on geometric phase is demonstrated in a three-qubit system. Fault-tolerant quantum memory plays a key role in interfacing quantum computers with quantum networks to construct quantum computer networks. Manipulation of spin quantum memory generally requires a magnetic field, which hinders the integration with superconducting qubits. Completely zero-field operation is desirable for scaling up a quantum computer based on superconducting qubits. Here we demonstrate quantum error correction to protect the nuclear spin of the nitrogen as a quantum memory in a diamond nitrogen-vacancy center with two nuclear spins of the surrounding carbon isotopes under a zero magnetic field. The quantum error correction makes quantum memory resilient against operational or environmental errors without the need for magnetic fields and opens a way toward distributed quantum computation and a quantum internet with memory-based quantum interfaces or quantum repeaters.

Geometric entanglement of a photon and spin qubits in diamond

Y Sekiguchi, Y Yasui, K Tsurumoto, Y Koga, R Reyes, H Kosaka,

Communications Physics 4 ( 1 ) 2021.12 [Reviewed]

DOI Web of Science

Language：English Publishing type：Research paper (scientific journal) Publisher：nature publishing Joint Work

Geometric Quantum Gates over Spin Qubits in Diamond

Kosaka Hideo, Nagata Kodai, Kuramitani Kouyou

Butsuri 75 ( 11 ) 683 - 689 2020

DOI CiNii Research

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Physical Society of Japan Joint Work

The geometric phase, generally discarded as a global phase, allows universal holonomic gating of an ideal logical qubit, which we call a geometric spin qubit, defined in the degenerate subspace of the triplet spin qutrit. We here experimentally demonstrate non-adiabatic and non-abelian holonomic quantum gates over the geometric spin qubit on an electron or nitrogen nucleus. We manipulate purely the geometric phase with a polarized microwave in a nitrogen-vacancy center in diamond under a zero-magnetic field at room temperature. We also demonstrate a two-qubit holonomic gate to show universality by manipulating the electron-nucleus entanglement.

Other Link： https://ci.nii.ac.jp/naid/130007953042

Dynamical Decoupling of a Geometric Qubit

Sekiguchi Yuhei, Komura Yusuke, Kosaka Hideo

PHYSICAL REVIEW APPLIED 12 ( 5 ) 2019.11

DOI Web of Science

Language：Japanese Publishing type：Research paper (scientific journal) Joint Work

Quantum teleportation-based state transfer of photon polarization into a carbon spin in diamond

Tsurumoto Kazuya, Kuroiwa Ryota, Kano Hiroki, Sekiguchi Yuhei, Kosaka Hideo

COMMUNICATIONS PHYSICS 2 2019.6 [Reviewed]

DOI Web of Science

Language：Japanese Publishing type：Research paper (scientific journal) Joint Work

Universal holonomic quantum gates over geometric spin qubits with polarised microwaves

Kodai Nagata,Kouyou Kuramitani,Yuhei Sekiguchi,Hideo Kosaka

Nature Communications 9 3227 2018.8 [Reviewed]

DOI Web of Science PubMed

Language：English Publishing type：Research paper (scientific journal) Publisher：SPRINGER NATURE Joint Work

Other Link： http://www.nature.com/articles/s41467-018-05664-w

Two-step frequency conversion for connecting distant quantum memories by transmission through an optical fiber

Shuhei Tamura,Kohei Ikeda,Kotaro Okamura,Kazumichi Yoshii,Feng-Lei Hong,Tomoyuki Horikiri,Hideo Kos … Show more authors

JAPANESE JOURNAL OF APPLIED PHYSICS 57 ( 6 ) 062801 2018.5 [Reviewed]

DOI Web of Science

Language：English Publishing type：Research paper (scientific journal) Publisher：IOP PUBLISHING LTD Joint Work

Ultrabright narrow-band telecom two-photon source for long-distance quantum communication

Niizeki Kazuya, Ikeda Kohei, Zheng Mingyang, Xie Xiuping, Okamura Kotaro, Takei Nobuyuki, Namekata … Show more authors

APPLIED PHYSICS EXPRESS 11 ( 4 ) 2018.4

DOI Web of Science

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Institute of Physics Joint Work

We demonstrate an ultrabright narrow-band two-photon source at the 1.5 µm telecom wavelength for long-distance quantum communication. By utilizing a bow-tie cavity, we obtain a cavity enhancement factor of 4.06 × 104. Our measurement of the second-order correlation function G(2)(τ) reveals that the linewidth of 2.4 MHz has been hitherto unachieved in the 1.5 µm telecom band. This two-photon source is useful for obtaining a high absorption probability close to unity by quantum memories set inside quantum repeater nodes. Furthermore, to the best of our knowledge, the observed spectral brightness of 3.94 × 105pairs/(s·MHz·mW) is also the highest reported over all wavelengths.

Other Link： https://ci.nii.ac.jp/naid/150000115486

Compact frequency-stabilized pump laser for wavelength conversion in long-distance quantum communication

Kohei Ikeda, Yusuke Hisai, Kazumichi Yoshii, Hideo Kosaka, Feng-Lei Hong, and Tomoyuki Horikiri

Journal of the Optical Society of America B 35 ( 8 ) 2023 - 2028 2018 [Reviewed]

DOI Web of Science

Language：English Publishing type：Research paper (scientific journal) Publisher：OPTICAL SOC AMER Joint Work

Universal holonomic single quantum gates over a geometric spin with phase-modulated polarized light

Naoki Ishida,Takaaki Nakamura,Touta Tanaka,Shota Mishima,Hiroki kano,Ryota Kuroiwa,Yuhei Sekiguchi, … Show more authors

Optics Letters 43 ( 10 ) 2380 - 2383 2018 [Reviewed]

DOI Web of Science PubMed

Language：English Publishing type：Research paper (scientific journal) Publisher：OPTICAL SOC AMER Joint Work

Selective entanglement control of 13C quantum memories around an NV center in Diamond

Kuramitani Kouyou, Ishida Naoki, Ishizaka Taiichi, Sato Koji, Kosaka Hideo

Meeting Abstracts of the Physical Society of Japan 73 ( 0 ) 662 - 662 2018

DOI

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Physical Society of Japan Joint Work

Other Link： https://ci.nii.ac.jp/naid/130007648751

Self-error-correcting holonomic decoupling of carbon memories around an NV center in diamond

Sekiguchi Yuhei, Sato Koji, Nakamura Takaaki, Kuramitani Kouyou, Nagata Kodai, Kosaka Hideo

Meeting Abstracts of the Physical Society of Japan 73 ( 0 ) 663 - 663 2018

DOI

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Physical Society of Japan Joint Work

Other Link： https://ci.nii.ac.jp/naid/130007648754

Optical holonomic single quantum gates with a geometric spin under with a zero field

Yuhei Sekiguchi, Naeko Niikura, Ryota Kuroiwa, Hiroki Kano and Hideo Kosaka

Nature Photonics 11 ( 57 ) 309–314 2017.4 [Reviewed]

DOI Web of Science

Language：English Publishing type：Research paper (scientific journal) Publisher：NATURE PUBLISHING GROUP Single Work

High fidelity transfer and storage of photon states in a single nuclear spin

Sen Yang, Ya Wang, Thai Hien Tran, S. Ali Momenzadeh, M. Markham, D. J.Twitchen, Rainer Stohr, Phil … Show more authors

Nature Photonics 10 ( 8 ) 507 - 511 2016.6 [Reviewed]

DOI Web of Science

Language：English Publishing type：Research paper (scientific journal) Publisher：NATURE PUBLISHING GROUP Joint Work

Geometric spin echo under zero field

Yuhei Sekiguchi, Yusuke Komura, Shota Mishima, Touta Tanaka, Naeko Niikura and Hideo Kosaka

Nature Communications 7 11668 2016.5

DOI Web of Science PubMed

Language：English Publishing type：Research paper (scientific journal) Publisher：NATURE PUBLISHING GROUP Joint Work

Teleportation-based Quantum Media Conversion from photons to a nuclear spin in diamond

Yuhei Sekiguchi, Naeko Niikura, Ryota Kuroiwa, Joerg Wrachtrup, and Hideo Kosaka

Physics of Light-Matter Coupling in Nanostructures (PLMCN17) 2016.3 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Diamond based quantum repeater device -Geometric bang-bang echo for quantum state preservation

Yusuke Komura, Yuhei Sekiguchi, Shota Mishima, Touta Tanaka, Naeko Niikura and Hideo Kosaka

5th International Conference on Quantum Cryptography (QCrypt2015) 2015.9 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Diamond based quantum repeater device -Degenerate spin echo for quantum state recovery

Yuhei Sekiguchi, Yusuke Komura and Hideo Kosaka

5th International Conference on Quantum Cryptography (QCrypt2015) 2015.9 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Diamond based quantum repeater device -Entanglement detection for quantum state swapping

Naeko Niikura, Shota Mishima, Touta Tanaka, Yuhei Sekiguchi, Yusuke Komura and Hideo Kosaka

5th International Conference on Quantum Cryptography (QCrypt2015) 2015.9 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Geometric echo of a purely geometric spin qubit in diamond

Yuhei Sekiguchi, Yusuke Komura, Shota Mishima, Touta Tanaka, Naeko Niikura, and Hideo Kosaka

SpinTech Ⅷ, Basel, Switzerland 2015.8 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Absorption-based Quantum Communication with NV centres

Burkhard Scharfenberger, Hideo Kosaka, William Munro, Kae Nemoto

New Journal of Physics 17 103012 2015.7 [Reviewed]

DOI Web of Science

Language：English Publishing type：Research paper (scientific journal) Publisher：IOP PUBLISHING LTD Joint Work

Optical quantum memory made from single nuclear spin in nitrogen vacancy in diamond

Sen Yang, Ya Wang, Thai Hien Tran, S Ali Momenzadeh, Rainer Stoehr,Philipp Neumann, Hideo Kosaka, J … Show more authors

Bulletin of the American Physical Society 60 ( 1 ) 2015.3 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Publisher：APS Joint Work

Entangled Absorption of a Single Photon with a Single Spin in Diamond

H. Kosaka and N. Niikura

Physical Review Letters 114 ( 5 ) 053603 2015.2 [Reviewed]

DOI Web of Science PubMed

Language：English Publishing type：Research paper (scientific journal) Publisher：AMER PHYSICAL SOC Joint Work

Development of a time-dependent T-matrix theory

Kaoru Ohno, Shota Ono, Swastibrata Bhattacharyya, Tomoyuki Horikiri, and Hideo Kosaka

International Symposium on Computics: Quantum Simulation and Design (ISC-QSD) 2014.12 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Quantum Repeater Approach based on Diamond Spin Qubit

QELS_Fundamental Science FTu1A.4The Conference on Lasers and Electro-Optics (CLEO) 2014.6 [Reviewed]

DOI

Language：English Publishing type：Research paper (scientific journal) Single Work

Process tomography of coherent state transfer from light polarization to electron spin polarization in a semiconductor

Takahiro Inagaki, Hideo Kosaka, Yasuyoshi Mitsumori, and Keiichi Edamatsu

Phys. Rev. B 89 ( 8 ) 085311 2014.2 [Reviewed]

DOI Web of Science

Language：English Publishing type：Research paper (scientific journal) Publisher：AMER PHYSICAL SOC Joint Work

Observation of bound and antibound states of cavity polariton pairs in a CuCl microcavity

S. Matsuura, Y. Mitsumori, H. Kosaka, K. Edamatsu, K. Miyazaki, D. Kim, M. Nakayama, G. Oohata, H. … Show more authors

Phys. Rev. B 89 035317 2014.1 [Reviewed]

DOI

Language：English Publishing type：Research paper (scientific journal) Joint Work

Entangled-state generation with an intrinsically pure single-photon source and a weak coherent source

Rui-Bo Jin, Ryosuke Shimizu, Fumihiro Kaneda, Yasuyoshi Mitsumori, Hideo Kosaka and Keiichi Edamatsu

Phys. Rev. A 88 012324 2013.7 [Reviewed]

DOI

Language：English Publishing type：Research paper (scientific journal) Joint Work

Excitonic Rabi oscillations in self-assembled quantum dots in the presence of a local field effect

Kenta Asakura, Yasuyoshi Mitsumori, Hideo Kosaka, K. Edamatsu, Kouichi Akahane, Naokatsu Yamamoto, … Show more authors

Phys. Rev. B 87 ( 24 ) 241301 2013.6 [Reviewed]

DOI

Language：English Publishing type：Research paper (scientific journal) Joint Work

Experimental Activation of Bound Entanglement

Fumihiro Kaneda, Ryosuke Shimizu, Satoshi Ishizaka, Yasuyoshi Mitsumori, Hideo Kosaka, Keiichi Edam … Show more authors

Phys. Rev. Lett. 109 ( 4 ) 040501/1 - 5 2012.7 [Reviewed]

DOI

Language：English Publishing type：Research paper (scientific journal) Joint Work

Four-Photon Quantum Interferometry at a Telecom Wavelength

M. Yabuno, R. Shimizu, Y. Mitsumori, H. Kosaka, and K. Edamatsu

Phys. Rev. A 86 ( 1 ) 010302/1 - 4 2012.7 [Reviewed]

DOI

Language：English Publishing type：Research paper (scientific journal) Joint Work

Coherent transfer of time-bin photons to electron spins in a semiconductor

Hideo Kosaka, Takahiro Inagaki, Ryuta Hitomi, Fumishige Izawa, Yoshiaki Rikitake, Hiroshi Imamura, … Show more authors

Phys. Rev. A 85 ( 4 ) 042304 - 1-8 2012.4 [Reviewed]

DOI Web of Science

Language：English Publishing type：Research paper (scientific journal) Joint Work

Electron spin state tomography with coherent Kerr effect

Takahiro Inagaki, Hideo Kosaka*, Yasuyoshi Mitsumori, and Keiichi Edamatsu

Appl. Phys. Let. 99 ( 17 ) 173108/1 - 3 2011.10 [Reviewed]

DOI

Language：English Publishing type：Research paper (scientific journal) Joint Work

Micro-pump-probe spectroscopy of an exciton in a single semiconductor quantum dot using a heterodyne technique

Y. Mitsumori, Y. Miyahara, K. Uedaira, H. Kosaka, S. Shimomura, S. Hiyamizu, and K. Edamatsu

Jpn. J. Appl. Phys. 50 ( 9 ) 095004/1 - 4 2011.9 [Reviewed]

DOI

Language：English Publishing type：Research paper (scientific journal) Joint Work

Photon-to-Electron Quantum Information Transfer

H. Kosaka

J. Appl. Phys. 109 ( 10 ) 102414 - 1-5 2011.5 [Reviewed]

DOI

Language：English Publishing type：Research paper (scientific journal) Single Work

High-visibility nonclassical interference between intrinsically pure heralded single photons and photons from a weak coherent field

Rui-Bo Jin, Jun Zhang, Ryosuke Shimizu, Nobuyuki Matsuda, Yasuyoshi Mitsumori, Hideo Kosaka, and Ke … Show more authors

Phys. Rev. A 83 ( 3 ) 031805 2011.3 [Reviewed]

DOI

Language：English Publishing type：Research paper (scientific journal) Joint Work

Single charge detection of an electron created by a photon in a g-factor engineered quantum dot

Makoto Kuwahara, Takeshi Kutsuwa, Keiji Ono and Hideo Kosaka

Appl. Phys. Lett. 96 ( 16 ) 163107 - 163107-3 2010.4 [Reviewed]

DOI

Language：English Publishing type：Research paper (scientific journal) Joint Work

Measurement of Electron Spin States in a Semiconductor Quantum Well Using Tomographic Kerr Rotation

Takahiro Inagaki, Hideo Kosaka, Yoshiaki Rikitake, Hiroshi Imamura, Yasuyoshi Mitsumori, and Keiich … Show more authors

Jap. J. Appl. Phys. 49 ( 4 ) 04DJ09;1 - 4 2010.4 [Reviewed]

DOI

Language：English Publishing type：Research paper (scientific journal) Joint Work

Proposal of a full Bell state analyzer for spin qubits in a double quantum dot

Nobuhiko Yokoshi, Hiroshi Imamura and Hideo Kosaka

Phys. Rev. B, Rapid Comm. 81 ( 16 ) 161305 - 161305 2010.4 [Reviewed]

DOI

Language：English Publishing type：Research paper (scientific journal) Joint Work

Optical measurement of electron spin coherence in a semiconductor quantum well

T. Inagaki, H. Kosaka, Y. Rikitake, H. Imamura, Y. Mitsumori, K. Edamatsu

Physica E 42 ( 4 ) 922 - 925 2010.2 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Single-electron spin resonance in a g-factor-controlled semiconductor quantum dot

Takeshi Kutsuwa, Makoto Kuwahara, Keiji Ono, Hideo Kosaka

Physica E 42 ( 4 ) 821 - 824 2010.2 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

All-optical phase modulations in a silicon wire waveguide at ultralow light levels

Nobuyuki Matsuda, Ryosuke Shimizu, Yasuyoshi Mitsumori, Hideo Kosaka, Aya Sato, Hiroyuki Yokoyama, … Show more authors

Appl. Phys. Lett. 95 ( 17 ) 171110 - 171110-3 2009.10 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Electrical Measurement of a Two-Electron Spin State in a Double Quantum Dot

Nobuhiko Yokoshi, Hiroshi Imamura and Hideo Kosaka

Phys. Rev. Lett. 103 ( 4 ) 046806;1 - 4 2009.4 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Spin state tomography of optically injected electrons in a semiconductor

Hideo Kosaka, Takahiro Inagaki, Yoshiaki Rikitake, Hiroshi Imamura, Yasuyoshi Mitsumori and Keiichi … Show more authors

Nature 457 ( 7230 ) 702 - 705 2009.2 [Reviewed]

Web of Science

Language：English Publishing type：Research paper (scientific journal) Joint Work

Observation of optical-fibre Kerr nonlinearity at the single-photon level

Nobuyuki Matsuda, Ryosuke Shimizu, Yasuyoshi Mitsumori, Hideo Kosaka, and Keiichi Edamatsu

Nature Photonics 3 ( 2 ) 95 - 98 2009.2 [Reviewed]

Web of Science

Language：English Publishing type：Research paper (scientific journal) Joint Work

Other Link： http://www.nature.com/nphoton/journal/v3/n2/full/nphoton.2008.292.html

Coherent transfer of light polarization to electron spins in a semiconductor

Hideo Kosaka, Hideki Shigyou, Yasuyoshi Mitsumori, Yoshiaki Rikitake, Hiroshi Imamura, Takeshi Kuts … Show more authors

Physical Review Letters 100 ( 9 ) 096602; 1 - 4 2008.3 [Reviewed]

Web of Science

Language：English Publishing type：Research paper (scientific journal) Joint Work

Other Link： http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.100.096602

Generation of polarization entanglement from spatially correlated photons in spontaneous parametric down-conversion

Ryosuke Shimizu, Takashi Yamaguchi, Yasuyoshi Mitsumori, Hideo Kosaka, and Keiichi Edamatsu

Phys. Rev. A 77 ( 3 ) 032338;1 - 4 2008.3 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Theoretical Analysis of the Optimal Conditions for Photon-Spin Quantum State Transfer

Yoshiaki Rikitake Hiroshi Imamura and Hideo Kosaka

Journal of the Physical Society of Japan 76 ( 11 ) 114004;1 - 6 2007.11 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Publisher：The Physical Society of Japan Joint Work

Lossless All-Optical phase gate using a Polarization-Division Sagnac Interferometer Applicable to a Waveguide-Type Kerr Medium

Nobuyuki Matsuda, Yasuyoshi Mitsumori, Hideo Kosaka, and Keiichi Edamatsu

Appl. Phys. Lett. 91 ( 17 ) 171119 - 171119-3 2007.10 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Polarization Transfer from Photon to Electron Spin in g factor Engineered Quantum Wells

H. Kosaka, Y. Mitsumori, Y. Rikitake, and H. Imamura

Appl. Phys. Lett. 90 ( 11 ) 113511 - 113511-3 2007.3 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Single-photon interference over 150 km transmission using silica-based integrated-optic interferometers for quantum cryptography

Tadamasa Kimura, Yoshihiro Nambu, Takaaki Hatanaka, Akihisa Tomita, Hideo Kosaka, Kazuo Nakamura

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS 43 ( 9A-B ) L1217 - L1219 2004.9 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Littrow-type external-cavity diode laser with a triangular prism for suppression of the lateral shift of output beam

A. Takamizawa, G. Yonezawa, H. Kosaka, and K. Edamatsu

Rev. Sci. Instr. 77 ( 4 ) 046102 - 046102 2004.4 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Single-photon interference experiment over 100 km for quantum cryptography system using a balanced gated-mode photon detector

Hideo Kosaka, Akihisa Tomita, Yoshihiro Nambu, Tadamasa Kimura, and Kazuo Nakamura

Electron. Lett. 39 ( 16 ) 1199 - 1201 2003.9 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Single Photoelectron Trapping, Storage, and Detection in a Field Effect Transistor

H. Kosaka, D.S. Rao, H.D. Robinson, P. Bandaru, K. Makita, and E. Yablonovitch

Phys. Review B 67 ( 4 ) 045104 - 1-5 2003.1

Web of Science

Language：English Publishing type：Research paper (scientific journal) Joint Work

Photoconductance Quantization in a Single-Photon Detector

H. Kosaka, D.S. Rao, H.D. Robinson, P. Bandaru, T. Sakamoto, and E. Yablonovitch

Phys. Rev. B Rapid Communications 65 ( 20 ) R201307 - 1-4 2002.5 [Reviewed]

Web of Science

Language：English Publishing type：Research paper (scientific journal) Joint Work

Electron g factor engineering in III-V semiconductors for quantum communications

H. Kosaka, A. A. Kiselev, F. A. Baron, K. W. Kim, and E. Yablonovitch

Electron. Lett. 37 ( 7 ) 464 - 465 2001.3 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Splitting of triply degenerate refractive indices by photonic crystals

H. Kosaka, T. Kawashima, A. Tomita, M. Notomi, T. Tamamura, T. Sato, and S. Kawakami

Phys. Rev. B 62 ( 3 ) 1477 - 1480 2000.7 [Reviewed]

Web of Science

Language：English Publishing type：Research paper (scientific journal) Joint Work

Triple-exposure method for fabricating triangular-lattice photonic crystals

Tokushima M, Kosaka H, Tomita A

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS 39 ( 7A ) 4236 - 4240 2000.6 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Lightwave propagation through a 120 degrees sharply bent single-line-defect photonic crystal waveguide

M. Tokushima, H. Kosaka, A. Tomita, and H. Yamada

Appl. Phys. Lett. 76 ( 8 ) 952 - 954 2000.2 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Photonic-crystal spot-size converter

H. Kosaka, T. Kawashima, A. Tomita, T. Sato, and S. Kawakami

Appl. Phys. Lett. 76 ( 3 ) 268 - 270 2000.1 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Superprism phenomena in photonic crystals: Toward micro-scale lightwave circuits

H. Kosaka, T. Kawashima, A. Tomita, M. Notomi, T. Tamamura, T. Sato, and S. Kawakami

IEEE J. Lightwave Technol. 17 ( 11 ) 2032 - 2038 1999.11 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Self-collimating phenomena in photonic crystals

H. Kosaka, T. Kawashima, A. Tomita, M. Notomi, T. Tamamura, T. Sato, and S. Kawakami

Appl. Phys. Lett. 74 ( 9 ) 1212 - 1214 1999.3 [Reviewed]

Web of Science

Language：English Publishing type：Research paper (scientific journal) Joint Work

Smart integration and packaging of 2D VCSELs for high-speed parallel links

H. Kosaka

J. Selected Topics in Quantum Electron. 5 ( 2 ) 184 - 192 1999.3 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Single Work

Photonic crystals for micro lightwave circuits using wavelength-dependent angular beam steering

H. Kosaka, T. Kawashima, A. Tomita, M. Notomi, T. Tamamura, T. Sato, and S. Kawakami

Appl. Phys. Lett. 74 ( 10 ) 1370 - 1372 1999.3 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Superprism phenomena in photonic crystals

H. Kosaka, T. Kawashima, A. Tomita, M. Notomi, T. Tamamura, T. Sato, and S. Kawakami

Phys. Rev. B Rapid Communications 58 ( 11 ) 10096R - 10098R 1998.11 [Reviewed]

Web of Science

Language：English Publishing type：Research paper (scientific journal) Joint Work

Multidimensional VCSEL-Array Push/pull Module Fabricated Using the Self-Alignment Mounting Technique

H. Kosaka, M. Kajita, and Y. Sugimoto

IEEE Trans. on Components, Packaging and Manufacturing Technology (CPMT) - Part B 21 ( 4 ) 1 - 9 1998.11 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Polarization-Controlled Single-Mode VCSEL

T. Yoshikawa, T. Kawakami, H. Saito, H. Kosaka, M. Kajita, K. Kurihara, Y. Sugimoto, and K. Kasahara

IEEE J. Quantum Electron. 34 ( 6 ) 1009 - 1015 1998.6 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Self-stopping Selective-oxidation Process of AlAs

T. Yoshikawa, H. Saito, H. Kosaka, Y. Sugimoto, and K. Kasahara

Appl. Phys. Lett. 72 ( 18 ) 2310 - 2312 1998.5 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

High-speed VCSEL of modulation bandwidth over 7.0 GHz and its application to 100 m PCF datalink

Dutta, A.K.; Kosaka, H.; Kurihara, K.; Sugimasa, Y.; Kasahara, K.

Journal of Lightwave Technology 16 ( 5 ) 1394 - 1399 1998.5 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Vertical-Cavity Surface-Emitting Laser and Its Applications for Optical Interconnection and Switch

H. Kosaka

Jpn. J. of Appl. Phys. 37 ( 3B ) 1394 - 1399 1998.3 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Single Work

1-Gb/s Modulation characteristics of a vertical-cavity surface-emitting laser array module

M. Kajita, H. Kosaka, M. Yamada, Y. Sugimoto, K. Kurata, and T. Tanabe

IEEE Photon. Technol. Lett 9 ( 2 ) 146 - 148 1997.2 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

A 16x16 Optical Full-Cross-bar Connection Module with VCSEL-Array Push/pull Module and Polymer-waveguide Coupler Connector

H. Kosaka, M. Kajita, M. Yamada, Y. Sugimoto, K. Kurata, and T. Tanabe

IEEE Photon. Technol. Lett. 9 ( 2 ) 244 - 246 1997.2 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

A Two-dimensional Optical Parallel Transmission using a Vertical-Cavity Surface-Emitting Laser Array Module and an Image Fiber

H. Kosaka, M. Kajita, Y. Li, and Y. Sugimoto

IEEE Photon. Technol. Lett. 9 ( 2 ) 253 - 255 1997.2 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

High-Performance 980-nm Vertical-Cavity Surface-Emitting Lasers and Their Application to Two-Dimensional Array Interconects

Y. Sugimoto, H. Kosaka, T. Yoshikawa, H. Saitoh, K. Kurihara, and K. Kasahara

Advances in Vertical Cavity Surface Emitting Lasers 15 139 - 149 1997 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Fiber-image-guide-based bit-parallel optical interconnects

Y. Li, T. Wang, H. Kosaka, S. Kawai, and K. Kasahara

Appl. Opt. 35 ( 35 ) 6920 - 6933 1996.12 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

2D alignment free VCSEL-array module with push/pull fibre connector

H. Kosaka, M. Kajita, M. Yamada, Y. Sugimoto, K. Kurata, T. Tanabe, and Y. Kasukawa

Electron. Lett. 32 ( 21 ) 1991 - 1992 1996.10 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Alternately perpendicular polarization in chequer-pattern matrix arrays of VCSELs

T. Yoshikawa, H. Kosaka, M. Kajita, K. Kurihara, Y. Sugimoto, and K. Kasahara

Electron. Lett. 31 ( 18 ) 1573 - 1574 1995.8 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Gigabit-rate Optical-Signal Transmission Using Vertical-Cavity Surface-Emitting Lasers with Large-Core Plastic-Cladding Fibers

H. Kosaka, A. K. Dutta, K. Kurihara, Y. Sugimoto, and K. Kasahara

IEEE Photon. Technol. Lett. 7 ( 8 ) 926 - 928 1995.8 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Integration of single/double vertical-cavity devices by mask molecular beam epitay

H. Saito, H. Kosaka, Y. Sugimoto, and K. Kasahara

J. Crystal Growth 150 ( 1-4 ) 1318 - 1322 1995.5 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Control of Light-Output Polarization for Surface-Emitting-Laser Type Device by Strained Active Layer Grown on Misoriented Substrate

T. Numai, K. Kurihara, K. Kuhn, H. Kosaka, I. Ogura, M. Kajita, H. Saito, and K. Kasahara,

IEEE J. of Quantum Electron. 31 ( 4 ) 636 - 643 1995.4 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Complete polarization control of 8x8 vertical-cavity surface emitting matrix arrays

T. Yoshikawa, H. Kosaka, K. Kurihara, M. Kajita, Y. Sugimoto, and K. Kasahara

Appl. Phys. Lett. 66 ( 8 ) 908 - 910 1995.2 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Integration of vertical-cavity surface-emitting devices by molecular beam epitaxy regrowth

H. Saito, H. Kosaka, M. Sugimoto, I. Ogura, and K. Kasahara

J. of Vacuum Science & Technol. B 12 ( 5 ) 905 - 2909 1994.9 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Uniformity Improvement of Optical and Electrical Characteristics in Integrated Vertical-to-Surface Transmittion Electro-Photonic Device with a Vertical Cavity

K. Kurihara, T. Numai, T. Yoshikawa, H. Kosaka, M. Sugimoto, Y. Sugimoto, and K. Kasahara

Jpn. J. Appl. Phys. 33 ( 3A ) 1352 - 1356 1994.3 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Uniform Characteristics with Low Threshold and High Efficiency for a Single-Transverse-Mode Vertical-Cavity Surface-Emitting Laser-Type Device Array

H. Kosaka, K. Kurihara, A. Uemura, T. Yoshikawa, I. Ogura, T. Numai, M. Sugimoto, and K. Kasahara

IEEE Photon. Technol. Lett. 6 ( 3 ) 323 - 325 1994.3 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Thermal Analysis of Laser-Emission Surface-Normal Optical Devices with a Vertical Cavity

M. Kajita, T. Kawakami, K. Kurihara, T. Yoshikawa, H. Saito, Y. Sugimoto, M. Sugimoto, H. Kosaka, I … Show more authors

Jpn. J. Appl. Phys. 33 ( 1B ) 1994.1 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Pixels Consisting of a Single Vertical-Cavity Laser Thyristor and a Double Vertical-Cavity Phototransistor

H. Kosaka, I. Ogura, H. Saito, M. Sugimoto, K. Kurihara, T. Numai, and K. Kasahara

IEEE Photon. Technol. Lett. 5 ( 12 ) 1409 - 1411 1993.12 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Effect of Sidewall Reflector on Current versus Light Output in a pnpn Vertical-to-Surface Transmission Electrophotonic Device with a Vertical Cavity

T. Numai, K. Kurihara, I. Ogura, H. Kosaka, M. Sugimoto, and K. Kasahara

IEEE J. Quantum Electron. 29 ( 6 ) 2006 - 2012 1993.6 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Determination of Power Reflectivity of Quasi-Graded Distributed Bragg Reflectors Using Stopband Width

K. Kurihara, T. Numai, H. Kosaka, I. Ogura, M. Sugimoto, and K. Kasahara

IEEE Photon. Technol. Lett. 5 ( 3 ) 334 - 336 1993.3 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Indistinct threshold laser operation in a pnpn vertical to surface transmission electrophotonic device with a vertical cavity

T. Numai, H. Kosaka, I. Ogura, K. Kurihara, M. Sugimoto, K. Kasahara

IEEE Journal of Quantum Electronics 29 ( 2 ) 403 - 410 1993.2 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

High Electronic-Optical Conversion Efficiency in a Vertical-to-Surface-Transmission Electro-Photonic Device with a Vertical Cavity

T. Numai, K. Kurihara, I. Ogura, H. Kosaka, M. Sugimoto, and K. Kasahara

IEEE Photon. Technol. Lett. 5 ( 2 ) 136 - 138 1993.2 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Surface emitting devices with distributed Bragg reflectors grown by highly precise molecular beam epitaxy

M. Sugimoto, I. Ogura, H. Saito, A. Yasuda, K. Kurihara, H. Kosaka, T. Numai, and K. Kasahara

J. of Crystal Growth 127 ( 2 ) 1 - 4 1993.2 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Double-Mesa-Structure Vertical-to-Surface Transmission Electro-Photonic Device with a Vertical Cavity

K. Kurihara, T. Numai, I. Ogura, H. Kosaka, M. Sugimoto, and K. Kasahara

Jpn. J. Appl. Phys. 32 ( 1B ) 604 - 608 1993.1 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Pixels Consisting of Double Vertical-Cavity Detector and Single Vertical-Cavity Laser Sections for 2-D Bidirectional Optical Interconnections

H. Kosaka, I. Ogura, M. Sugimoto, H. Saito, T. Numai, and K. Kasahara

J. of Appl. Phys. 32 ( 1B ) 600 - 603 1993.1 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Dependence of Laser Characteristics on Distributed Bragg Reflector Pairs in Vertical-to-Surface Transmission Electrophotonic Devices

H. Kosaka, I. Ogura, T. Numai, M. Sugimoto, and K. Kasahara

Electron. Lett. 28 ( 16 ) 1524 - 1525 1992.7 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Very low threshold current density in vertical-cavity surface-emitting laser diodes with periodically doped distributed Bragg reflectors

Sugimoto, M.; Kosaka, H.; Kurihara, K.; Ogura, I.; Numai, T.; Kasahara, K.

Electron. Lett. 28 ( 4 ) 385 - 387 1992.2 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Vertical-to-Surface transmission electrophotonic device with a pnpn structure and vertical cavity

M. Sugimoto, T. Numai, I. Ogura, H. Kosaka, K. Kurihara, and K. Kasahara

Optical and Quantum Electron. 24 ( 2 ) S121 - S132 1992.2 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

VERTICAL TO SURFACE TRANSMISSION ELECTROPHOTONIC DEVICE (VSTEP) AND ITS APPLICATION TO OPTICAL INTERCONNECTION AND INFORMATION-PROCESSING

KASAHARA K, NUMAI T, KOSAKA H

IEICE TRANSACTIONS ON ELECTRONICS E75C ( 1 ) 70 - 80 1992.1 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Detector Characteristics of a Vertical-Cavity Surface-Emitting Laser

H. Kosaka, K. Kurihara, M. Sugimoto, and K. Kasahara

Jpn. J. of Appl. Phys. 30 ( 7A ) L1172 - L1174 1991.7 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Current versus Light-Output Characteristics with No Definite Threshold in pnpn Vertical to Surface Transmission Electro-Photonic Devices with a Vertical Cavity

T. Numai, M. Sugimoto, I. Ogura, H. Kosaka, and K. Kasahara

Jpn. J. Appl. Phys. 30 ( 4A ) L602 - L604 1991.4 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Surface-emitting laser operation in vertical-to-surface transmission electrophotonic devices with a vertical cavity

T. Numai, M. Sugimoto, I. Ogura, H. Kosaka, and K. Kasahara

Appl. Phys. Lett. 58 ( 12 ) 1250 - 1252 1991.3 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Optical self-routing switch using vertical to surface transmission electrophotonic deices with transmission light amplification function

T. Numai, I. Ogura, H. Kosaka, M. Sugimoto, Y. Tashiro, and K. Kasahara

Electron. Lett. 27 ( 7 ) 605 - 606 1991.3 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

Cascadable optical switching characteristics in vertical-to-surface transmission electrophotonic devices operated as vertical cavity lasers

Ogura, H. Kosaka, T. Numai, M. Sugimoto, and K. Kasahara

Appl. Phys. Lett. 60 ( 7 ) 799 - 801 1991.2 [Reviewed]

Language：English Publishing type：Research paper (scientific journal) Joint Work

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