竹内研究室 京都大学大学院工学研究科電子工学専攻

menu

Publication

Papers

2022

  1. Yu Mukai, Ryo Okamoto, and Shigeki Takeuchi
    Quantum Fourier-transform infrared spectroscopy in the fingerprint region
    Opt. Express 30, 22624-22636 (2022)
  2. Masaya Arahata, Yu Mukai, Toshiyuki Tashima, Ryo Okamoto, and Shigeki Takeuchi
    Wavelength-Tunable Quantum Absorption Spectroscopy in the Broadband Midinfrared Region
    Phys. Rev. Applied 18, 034015 (2022)
  3. Kyohei Hayama, Bo Cao, Ryo Okamoto, Shun Suezawa, Masayuki Okano, and Shigeki Takeuchi
    High-depth-resolution imaging of dispersive samples using quantum optical coherence tomography
    Opt. Lett. 47, 4949-4952 (2022)
  4. Nicolas Schwaller, Geobae Park, Ryo Okamoto, and Shigeki Takeuchi
    Optimizing the coupling efficiency of spontaneous parametric down-conversion photon pairs into single-mode fibers
    Phys. Rev. A 106, 043719 (2022)
Page Top

2021

  1. Frederick T.-K. So, Alexander I. Shames, Daiki Terada, Takuya Genjo, Hiroki Morishita, Izuru Ohki, Takeshi Ohshima, Shinobu Onoda, Hideaki Takashima, Shigeki Takeuchi, Norikazu Mizuochi, Ryuji Igarashi, Masahiro Shirakawa, and Takuya F. Segawa
    Anomalous Formation of Irradiation-Induced Nitrogen-Vacancy Centers in 5 nm-Sized Detonation Nanodiamonds
    J. Phys. Chem. C, 126, 11, 5206–5217 (2022)
  2. Hideaki Takashima, Atsushi Fukuda, Konosuke Shimazaki, Yusuke Iwabata, Hiroki Kawaguchi, Andreas W. Schell, Toshiyuki Tashima, Hiroshi Abe, Shinobu Onoda, Takeshi Ohshima, and Shigeki Takeuchi
    Creation of silicon vacancy color centers with a narrow emission line in nanodiamonds by ion implantation
    Optical Materials Express 11, 1978-1988 (2021)
  3. Masaya Arahata, Yu Mukai, Bo Cao, Toshiyuki Tashima, Ryo Okamoto, and Shigeki Takeuchi
    Wavelength variable generation and detection of photon pairs in visible and mid-infrared regions via spontaneous parametric downconversion
    J. Opt. Soc. Am. B 38, 1934-1941 (2021)
  4. Bo Cao, Mamoru Hisamitsu, Katsuhiko Tokuda, Sunao Kurimura, Ryo Okamoto, and Shigeki Takeuchi
    Efficient generation of ultra-broadband parametric fluorescence using chirped quasi-phase-matched waveguide devices
    Opt. Express 29, 21615-21628 (2021)
  5. Konosuke Shimazaki, Hiroki Kawaguchi, Hideaki Takashima, Takuya Fabian Segawa, Frederick T.-K. So, Daiki Terada, Shinobu Onoda, Takeshi Ohshima, Masahiro Shirakawa, Shigeki Takeuchi
    Fabrication of Detonation Nanodiamonds Containing Silicon-Vacancy Color Centers by High Temperature Annealing
    Phys. Status Solidi A, 218: 2100144 (2021)
  6. Toshiyuki Tashima, Hideaki Takashima, Andreas W. Schell, Toan Trong Tran, Igor Aharonovich & Shigeki Takeuchi
    Hybrid device of hexagonal boron nitride nanoflakes with defect centres and a nano-fibre Bragg cavity
    Sci. Rep. 12, 96 (2022)
Page Top

2020

  1. Takayuki Kiyohara, Ryo Okamoto, and Shigeki Takeuchi
    Unified integration scheme using an N×N active switch for efficient generation of a multi-photon parallel state
    Optics Express 28, 17490-17501 (2020)
  2. K. Sugiura, Z. Yin, R. Okamoto, L. Zhang, L. Kang, J. Chen, P. Wu, S. T. Chu, B. E. Little, and S. Takeuchi
    Broadband generation of photon-pairs from a CMOS compatible device
    Appl. Phys. Lett. 116, 224001 (2020)
  3. K. Fukushige, H. Kawaguchi, K. Shimazaki, T. Tashima, H. Takashima, and S. Takeuchi
    Identification of the orientation of a single NV center in a nanodiamond using a three-dimensionally controlled magnetic field
    Appl. Phys. Lett. 116, 264002 (2020)
  4. H. Takashima, H. Maruya, K. Ishihara, T. Tashima, K. Shimazaki, A. W. Schell, T. T. Tran, I. Aharonovich, and S. Takeuchi
    Determination of the Dipole Orientation of Single Defects in Hexagonal Boron Nitride
    ACS Photonics 7 2056-2063 (2020)
  5. S. Nohara, R. Okamoto, A. Fujiwara, and S. Takeuchi
    Adaptive quantum state estimation for dynamic quantum states
    Phys. Rev. A 102, 030401(R) (2020)
  6. S. Takeuchi, R. Okamoto, T. Tashima, Y. Mukai, B. Cao
    Current Status and Future Prospects of Sensing Technologies Using Quantum Entangled Photon
    Japanese Journal of Optics vol.49 No.08 pp317-323 (2020)
  7. R. Okamoto, Y. Tokami, and S. Takeuchi
    Loss tolerant quantum absorption measurement
    New J. Phys 22, 103016 (2020)
  8. T. Kiyohara, N. Yamashiro, R. Okamoto, H. Araki, J. -Yi Wu, H. F. Hofmann, and S. Takeuchi
    Direct and efficient verification of entanglement between two multimode-multiphoton systems
    Optica, 1517-1523 (2020)
  9. Z. Yin, K. Sugiura, H. Takashima, R. Okamoto, F. Qiu, S. Yokoyama, and S. Takeuchi
    Frequency correlated photon generation at telecom band using silicon nitride ring cavities
    Opt. Express 29, 4821-4829 (2021)
  10. Y. Mukai, M. Arahata, T. Tashima, R. Okamoto, and S. Takeuchi
    Quantum Fourier-Transform Infrared Spectroscopy for Complex Transmittance Measurements
    Phys. Rev. Applied 15, 034019 (2021)
  11. Koichiro Miyanishi, Takuya F. Segawa, Kazuyuki Takeda, Izuru Ohki, Shinobu Onoda, Takeshi Ohshima, Hiroshi Abe, Hideaki Takashima, Shigeki Takeuchi, Alexander I. Shames, Kohki Morita, Yu Wang, Frederick T.-K. So, Daiki Terada, Ryuji Igarashi, Akinori Kagawa, Masahiro Kitagawa, Norikazu Mizuochi, Masahiro Shirakawa, Makoto Negoro
    Room-temperature hyperpolarization of polycrystalline samples with optically polarized triplet electrons: pentacene or nitrogen-vacancy center in diamond?
    Magnetic Resonance 2(1) 33 - 48 Feb 17 (2021)
  12. Hideaki Takashima, Shigeki Takeuchi
    New Room-temperature Single Photon Source: Single Defect Center in Hexagonal Boron Nitride
    NEW DIAMOND (140) 17 - 20 Jan, (2021)
Page Top

2019

  1. Saki Nohara, Ryo Okamoto, Koichi Yamagata, Akio Fujiwara, and Shigeki Takeuchi
    Realization of high-speed adaptive quantum state estimation
    Jpn. J. Appl. Phys. 58 072001 (2019)
  2. Toshiyuki Tashima, Hideaki Takashima, and Shigeki Takeuchi
    Direct optical excitation of an NV center via a nanofiber Bragg-cavity: a theoretical simulation
    Optics Express, 27, 27009-27016 (2019)
Page Top

2018

  1. Hironaga Maruya, Yasuko Oe, Hideaki Takashima, Azusa N. Hattori, Hidekazu Tanaka, and Shigeki Takeuchi
    Non-contact detection of nanoscale structures using optical nanofiber
    Optics Express, 27, 367-276 (2019)
  2. Avshalom C. Elitzur, Eliahu Cohen, Ryo Okamoto and Shigeki Takeuchi
    Nonlocal Position Changes of a Photon Revealed by Quantum Routers
    Sci. Rep. 8, 7730 (2018)
  3. Kenta Sugiura, Ryo Okamoto, Labao Zhang, Lin Kang, Jian Chen, Peiheng Wu, Sai T. Chu, Brent E. Little and Shigeki Takeuchi
    An on-chip photon-pair source with negligible two-photon absoprtion
    Appl. Phys. Express 12 022006 (2019)
  4. Hideaki Takashima, Atsushi Fukuda, Hironaga Maruya, Toshiyuki Tashima, Andreas W. Schell, and Shigeki Takeuchi
    Fabrication of a nanofiber Bragg cavity with high quality factor using a focused helium ion beam
    Optics Express, 27, 6792-6800 (2019)
Page Top

2017

  1. Takayuki Kiyohara, Ryo Okamoto and Shigeki Takeuchi
    Serial-parallel conversion for single photons with heralding signals (This paper is highlighted as an Editor's Pick.)
    Optics Express, 25, 32443-32450 (2017)
  2. Masazumi Fujiwara, Oliver Neitzke, Tim Schröder, Andreas W. Schell, Janik Wolters, Jiabao Zheng, Sara Mouradian, Mohamed Almoktar, Shigeki Takeuchi, Dirk Englund, and Oliver Benson
    Fiber-Coupled Diamond Micro-Waveguides toward an Efficient Quantum Interface for Spin Defect Centers
    ACS Omega 2017, 2, 7194-7202
  3. Ryo Okamoto, Satoshi Oyama, Koichi Yamagata, Akio Fujiwara, Shigeki Takeuchi
    Experimental demonstration of adaptive quantum state estimation for single photonic qubits
    Phys. Rev. A 96, 022124 (2017)
  4. Takafumi Ono, Ryo Okamoto, Masato Tanida, Holger F. Hofmann, Shigeki Takeuchi
    Implementation of a quantum controlled-SWAP gate with photonic circuits
    Scientific Reports, 7, 45353 (2017)
  5. Andreas W. Schell, Hideaki Takashima, Toan Trong Tran, Igor Aharonovich, and Shigeki Takeuchi
    Coupling Quantum Emitters in 2D Materials with Tapered Fibers
    Coupling Quantum Emitters in 2D Materials with Tapered Fibers
Page Top

2016

  1. Takayuki Kiyohara, Ryo Okamoto and Shigeki Takeuchi
    Realization of multiplexing of heralded single photon sources using photon number resolving detectors
    Optics Express, 24, 27288-27297 (2016)
  2. Satoshi Hara, Takafumi Ono, Ryo Okamoto, Takashi Washio and Shigeki Takeuchi
    Quantum-state anomaly detection for arbitrary errors using a machine-learning technique
    Phys. Rev. A 94, 042341 (2016)
  3. Ryo Okamoto, and Shigeki Takeuchi
    Experimental demonstration of a quantum shutter closing two slits simultaneously
    Scientific Reports, 6, 35161 (2016)
  4. Masazumi Fujiwara, Kazuma Yoshida, Tetsuya Noda, Hideaki Takashima, Andreas W Schell, Norikazu Mizuochi and Shigeki Takeuchi
    Manipulation of single nanodiamonds to ultrathin fiber-taper nanofibers and control of NV-spin states toward fiber-integrated λ-systems
    Nanotechnology, 27, 455202 (2016)
  5. Andreas W. Schell, Toan Trong Tran, Hideaki Takashima, Shigeki Takeuchi, and Igor Aharonovich
    Non-linear excitation of quantum emitters in hexagonal boron nitride multiplayers
    APL Photonics, 1, 091302 (2016)
  6. Hideaki Takashima, Masazumi Fujiwara, Andreas W. Schell, and Shigeki Takeuchi
    Detailed numerical analysis of photon emission from a single light emitter coupled with a nanofiber Bragg cavity
    Optics Express, 24, 15050 (2016)
  7. T.Dehoux, K.Ishikawa, P. H Otsuka, M.Tomoda, O.Matsuda, M.Fujiwara, S.Takeuchi, I A.Veres, V. E Gusev and O. B Wright
    Optical tracking of picosecond coherent phonon pulse focusing inside a sub-micron object
    Light: Science & Applications 5, e16082 (2016)
Page Top

2015

  1. Kazuhiko Kamitani, Takuya Muranaka, Hideaki Takashima, Masazumi Fujiwara, Utako Tanaka, Shigeki Takeuchi and Shinji Urabe
    Measuring the charge density of a tapered optical fiber using trapped microparticles
    Optics Express, 24, 4672 (2016)
  2. Shigeki Takeuchi
    Photonic quantum information : science and technology
    Proceedings of the Japan Academy, Series B, 92, 29-43 (2016)
  3. Masazumi Fujiwara, Hong-Quan Zhao, Tetsuya Noda, Kazuhiro Ikeda, Hitoshi Sumiya and Shigeki Takeuchi
    Ultrathin fiber-taper coupling with nitrogen vacancy centers in nanodiamonds at cryogenic temperatures
    Optics Letters, 40, 5702 (2015)
  4. Masayuki Okano, Hwan Hong Lim, Ryo Okamoto, Norihiko Nishizawa, Sunao Kurimura and Shigeki Takeuchi
    0.54 μm resolution two-photon interference with dispersion cancellation for quantum optical coherence tomography
    Sci. Rep. 5, 18042 (2015)
  5. Andreas W. Schell, Hideaki Takashima, Shunya Kamioka, Yasuko Oe, Masazumi Fujiwara, Oliver Benson and Shigeki Takeuchi
    Highly Efficient Coupling of Nanolight Emitters to a Ultra-Wide Tunable Nanofibre Cavity
    Sci. Rep. 5, 9619 (2015)
  6. 岡本亮、岡野真之、竹内繁樹
    量子もつれ光の光計測への応用
    OplusE 2015年9月号(第430号)
  7. 竹内繁樹、小野貴史、岡本亮
    量子もつれ顕微鏡
    応用物理 第84巻 第8号 (2015)
  8. 竹内繁樹
    2.2.2量子的な光の発生 2.2.3量子もつれ合い光子対と量子情報処理
    発光の事典 基礎からイメージングまで 朝倉書店
Page Top

2014

  1. Mohamed Almokhtar, Masazumi Fujiwara, Hideaki Takashima, and Shigeki Takeuchi
    Numerical simulations of nanodiamond nitrogen-vacancy centers coupled with tapered optical fibers as hybrid quantum nanophotonic devices
    Opt. Express 22(17), 20045-20059 (2014)
Page Top

2013

  1. Shigeki Takeuchi
    Quantum Information Science Using Photons
    AAPPS Bulletin 24(1), 19-25 (2014)
  2. Shigeki Takeuchi
    Recent progress in single-photon and entangled-photon generation and applications
    Jpn. J. Appl. Phys. 53 030101 (2014)
  3. Satoshi Hara, Takafumi Ono, Ryo Okamoto, Takashi Washio, and Shigeki Takeuchi
    Anomaly detection in reconstructed quantum states using a machine-learning technique
    Phys. Rev. A 89, 022104 (2013)
  4. Hong-Quan Zhao, Masazumi Fujiwara, Masayuki Okano, and Shigeki Takeuchi
    Observation of 1.2-GHz linewidth of zero-phonon-line in photoluminescence spectra of nitrogen vacancy centers in nanodiamonds using a Fabry-Perot interferometer
    Opt. Express 21(24), 29679-29686 (2013)
  5. Masayuki Okano, Ryo Okamoto, Akira Tanaka, Shutaro Ishida, Norihiko Nishizawa, and Shigeki Takeuchi
    Dispersion cancellation in high-resolution two-photon interference
    Phys. Rev. A 88, 043845 (2013)
  6. Shanthi Subashchandran, Ryo Okamoto, Labao Zhang, Akira Tanaka, Masayuki Okano, Lin Kang, Jian Chen, Peiheng Wu, and Shigeki Takeuchi
    Investigation of the Performance of an Ultralow-Dark-Count Superconducting Nanowire Single-Photon Detector
    Jpn. J. Appl. Phys. 52, 102801 (2013)
  7. Takafumi Ono, Ryo Okamoto, and Shigeki Takeuchi
    An entanglement-enhanced microscope
    Nat. Commun. 4, 2426 (2013)
Page Top

2012

  1. Akira Tanaka, Ryo Okamoto, Hwan Hong Lim, Shanthi Subashchandran, Masayuki Okano, Labao Zhang, Lin Kang, Jian Chen, Peiheng Wu, Toru Hirohata, Sunao Kurimura, and Shigeki Takeuchi
    Noncollinear parametric fluorescence by chirped quasi-phase matching for monocycle temporal entanglement
    Opt. Express, 20(23), 25228-25238 (2012)
  2. Masayuki Furuhashi, Masazumi Fujiwara, Takahito Ohshiro, Kazuki Matsubara, Makusu Tsutsui, Masateru Taniguchi, Shigeki Takeuchi, and Tomoji Kawai
    Embedded TiO2 waveguides for sensing nanofluorophores in a microfluidic channel
    Appl. Phys. Lett. 101, 153115 (2012)
  3. Hong-Quan Zhao, Masazumi Fujiwara, and Shigeki Takeuchi
    Effect of Substrates on the Temperature Dependence of Fluorescence Spectra of Nitrogen Vacancy Centers in Diamond Nanocrystals
    Jpn. J. Appl. Phys. 51, 090110 (2012)
  4. Ryo Okamoto, Minako Iefuji, Satoshi Oyama, Koichi Yamagata, Hiroshi Imai, Akio Fujiwara, and Shigeki Takeuchi
    Experimental Demonstration of Adaptive Quantum State Estimation
    Phys. Rev. Lett. 109, 130404 (2012)
  5. Masazumi Fujiwara, Tetsuya Noda, Akira Tanaka, Kiyota Toubaru, Hong-Quan Zhao, and Shigeki Takeuchi
    Coupling of ultrathin tapered fibers with high-Q microsphere resonators at cryogenic temperatures and observation of phase-shift transition from undercoupling to overcoupling
    Opt. Express 20(17), 19545-19553 (2012)
  6. Takashi Chiba, Hideki Fujiwara, Jun-ichi Hotta, Shigeki Takeuchi, Keiji Sasaki
    Experimental evaluation of diffusion constant in a thin polymer film by triplet lifetime analysis of single molecules
    Journal of Photochemistry and Photobiology A 238, 24-28 (2012)
  7. Hong-Quan Zhao, Masazumi Fujiwara, and Shigeki Takeuchi
    Suppression of fluorescence phonon sideband from nitrogen vacancy centers in diamond nanocrystals by substrate effect
    Opt. Express 20(14), 15628-15635 (2012)
  8. Masato Tanida, Ryo Okamoto, and Shigeki Takeuchi
    Highly indistinguishable heralded single-photon sources using parametric down conversions
    Opt. Express 20(14), 15275-15285 (2012)
  9. Masayuki Okano, Ryo Okamoto, Akira Tanaka, Shanthi Subashchandran, and Shigeki Takeuchi
    Generation of broadband spontaneous parametric fluorescence using multiple bulk nonlinear crystals
    Opt. Express 20(13), 13977-13987 (2012)
  10. Tim Schröder, Masazumi Fujiwara, Tetsuya Noda, Hong-Quan Zhao, Oliver Benson, and Shigeki Takeuchi
    A nanodiamond-tapered fiber system with high single-mode coupling efficiency
    Opt. Express 20(10), 10490-10497 (2012)
Page Top

2011

  1. M. Fujuwara, K. Toubaru and S. Takeuchi
    Optical transmittance degradation in tapered fibers
    Optics Express, 19(9), 8596-8601, (2011)
  2. Y. Miyamoto, D. Kawase, M. Takeda, S. Sasaki and S. Takeuchi
    Detection of superposition in the orbital angular momentum of photons without excess components and its application in the verification of non-classical correlation
    J.Opt., 13(6), 064027 (2011)
  3. R. Okamoto, J.L. O'Brien, H.F. Hofmann and S. Takeuchi
    Realization of a Knill-Laflamme-Milburn controlled-NOT photonic quantum circuit combining effective optical nonlinearities
    PNAS, 108 (25), 10067-10071 (2011)
  4. M.Furuhashi, M.Fujiwara, T.Ohshiro, M.Tsutsui, K.Matsubara, M.Taniguchi, S.Takeuchi and T.Kawai
    Development of microfabricated TiO2 channel waveguides
    AIP Advances, 1 (3), 032102 (2011)
  5. M.Fujiwara, K.Toubaru, T.Noda, H.Q.Zhao and S.Takeuchi
    Highly Efficient Coupling of Photons from Nanoemitters into Single-Mode Optical Fibers
    Nano Lett. 11 (10), 4362-4365 (2011)
Page Top

2010

  1. H. Fujiwara, Y. Kawabe, R. Okamoto, S. Takeuchi and S.Sasaki
    Quantum lithography under imperfect conditions: effects of loss and dephasing on two-photon interference fringes
    J.Opt.Soc.Am.B, 28(3), 422-431, (2011)
  2. A .Tanaka, T. Asai, K. Toubaru, H. Takashima, M. Fujiwara, R. Okamoto and S. Takeuchi
    Phase shift spectra of a fiber-microsphere system at the single photon level
    OPTICS EXPRESS, 19(3), 2257-2265, (2011)
  3. H. Takashima, T. Asai, K. Toubaru, M. Fujiwara, S. Sasaki and S. Takeuchi
    Fiber-microsphere system at cryogenic temperatures toward cavity QED using diamond NV centers
    OPTICS EXPRESS(OSA), 18(14), 15169-15173,(2010)
  4. P. Kalasuwan, G. Mendoza, A. Laing, T. Nagata, J. Coggins, M. Callaway, S. Takeuchi, A. Stefanov and J.L. O'Brien
    Simple scheme for expanding photonic cluster states for quantum information
    J.Opt.Soc.Am.B, 27(6), A181-A184, (2010)
  5. T. Nagata, R. Okamoto, H.F. Hofmann, and S. Takeuchi
    Analysis of experimental error sources in a linear-optics quantum gate
    New Journal of Physics, 12, 43053/1-43053/17, (2010)
Page Top

2009

  1. H. Oka, H. Fujiwara, S. Takeuchi and S. Sasaki
    Nonlinear optical phase shift obtained from two-level atoms confined in a planar microcavity
    J.Appl.Phys, 107(5), 054310/1-054310/6,(2010)
  2. T. Chiba, H. Fujiwara, J. Hotta, S. Takeuchi and S.Sasaki
    Dynamical Analysis of Triplet Lifetime of Single Molecules by a Photon Interdetection Time Analysis Method
    J.Phys.Chem.C, 113, 11652-11656, (2009)
Page Top

2008

The following researches are supported by CREST-JST.
  1. D. Kawase, Y. Miyamoto, M. Takeda, K. Sasaki and S. Takeuchi
    Effect of high-dimensional entanglement of Laguerre-Gaussian modes in parametric downconversion
    J. Opt. Soc. Am. B, 323, 483-485, (2009)
  2. R. Okamoto, J. L.. O'Brien, H. F. Hofmann, T. Nagata, K. Sasaki and S. Takeuchi
    An Entanglement Filter
    Science, 323, 483-485, (2009)
  3. D. Kawase, Y. Miyamoto, M. Takeda, K. Sasaki, and S. Takeuchi
    Observing Quantum Correlation of Photons in Laguerre-Gauss Modes Using the Gouy Phase
    Phys. Rev. Lett., 101, 050501/1-050501/4, (2008)
  4. R. Okamoto, H. F. Hofmann, T. Nagata, J. L.. O'Brien, K. Sasaki and S. Takeuchi
    Beating the standard quantum limit: phase super-sensitivity of N-photon interferometers
    New J. Phys., 10, 073033/1-073033/9, (2008).
Page Top

2007

The following researches are supported by CREST-JST.
  1. H. Takashima, H. Fujiwara, S. Takeuchi, K. Sasaki and M. Takahashi
    Control of spontaneous emission coupling factor βin fiber-coupled microsphere resonators
    Appl. Phys. Lett., 92(7), 07115/1-07115/3, (2008)
  2. Y. Kawabe, H. Fujiwara, R. Okamoto, K. Sasaki and S. Takeuchi
    Quantum interference fringes beating the diffraction limit
    Opt.Exp., 15(21), 14244-14250, (2007)
  3. Y. Kawabe, H. Fujiwara, S. Takeuchi and K. Sasaki
    Investigation of the Spatial Propagation Properties of Type-I Parametric Fluorescence by Use of Tuning Curve Filtering Method
    Jpn. J. Appl. Phys., 46(9A), 5802-5808, (2007)
  4. T. Nagata, R. Okamoto, J. L. O'Brien, K. Sasaki and S. Takeuchi
    Beating the Standard Quantum Limit with Four Entangled Photons
    Science., 316, 726-729, (2007)
Page Top

2006

  1. R. Okamoto, S. Takeuchi and K. Sasaki
    Tailoring two-photon interference with phase dispersion
    Phys. Rev. A 74, 011801/1-4 (2006)
    Details
  2. H. Takashima, H. Fujiwara, J. Hotta, S. Takeuchi, K. Sasaki, S. Murakami, T. Torimoto and B. Ohtani
    Analysis of quantum dot fluorescence coupled with a microsphere resonator
    Jpn. J. Appl. Phys. 45, 9A, 6917-6921 (2006)
  3. H. Konishi, H. Fujiwara, S. Takeuchi and K. Sasaki
    Polarization-discriminated spectra of a fiber-microsphere system
    Phys. Rev. A 74, 011801/1-4 (2006)
    Details
  4. A. Soujaeff, S. Takeuchi, K. Sasaki, T. Hasegawa and M. Matsui
    Heralded single photon source at 1550 nm from pulsed parametric down conversion
    J. Mod. Opt. 54, 2&3, 467-475 (2007)
  5. A. Soujaeff, T. Nishioka, T. Hasegawa, S. Takeuchi, T. Tsurumaru, K. Sasaki and M. Matsui
    Quantum key distribution at 1550 nm using a pulse heralded single photon source
    OPT. EXP. 15, 2, 726-734 (2007)
  6. H. Fujiwara, Y. Kawabe, S. Takeuchi and K. Sasaki
    Numerical analysis of spatial propagation of parametric fluorescence photon-pairs using the tuning curve filtering method
    Phys. Rev. A, 75, 023802/1-8 (2007)
    Details
  7. H. Takashima, H. Fujiwara, S. Takeuchi, K. Sasaki and M. Takahashi
    Fiber-microsphere laser with a submicrometer sol-gel silica glass layer codoped with erbium, aluminum, and phosphorus
    Appl. Phys. Lett., 90, 1, 053709/1-053709/3 (2007)
    Details
Page Top

2005

The following researches are supported by CREST-JST.
  1. A. Chiba, H. Fujiwara, J. Hotta, S. Takeuchi and K. Sasaki
    Fano resonance in a multimode tapered fiber coupled with a microspherical cavity
    Appl. Phys. Lett. 86,26,261106/1-3 (2005)
    Details
  2. H. Oka, S. Takeuchi and K. Sasaki
    Optical response of two-level atoms with reflection geometry as a model of a quantum phase gate
    Phys. Rev. A 72,013816/1-7 (2005)
    Details
  3. R. Okamoto, S. Takeuchi and K. Sasaki
    Detailed analysis of a single-photon source using gated spontaneous parametric downconversion
    Journal of the Optical Society of America B , 22, 11, 2393-2401(2005)
  4. R. Okamoto, H. F. Hofmann, S. Takeuchi and K. Sasaki
    Demonstration of an optical quantum controlled-NOT gate without path interference
    Physical Review Letters,95,21,210506/1-4 (2005)
    Details
  5.    
Page Top

2004

  1. K. Tsujino, H. F. Hofmann, S. Takeuchi and K. Sasaki
    Distinguishing genuine entangled two-photon-polarization states from independently generated pairs of entangled photons
    Phys. Rev. Lett. 92, 15, 153602/1-153602/4 (2004).
    Details
  2. H. F. Hofmann and S. Takeuchi
    Quantum-state tomography for spin-l systems
    Phys. Rev. A, 69, 042108/1-042108/8 (2004).
    Details
  3. A. Chiba, H. Fujiwara, J. Hotta, S. Takeuchi and K. Sasaki
    Resonant frequency control of a microspherical cavity by temperature adjustment
    Jpn. J. Appl. Phys. 43,9A,6138-6141 (2004)
  4. K. Kojima, H. F. Hofmann, S. Takeuchi and K. Sasaki
    Efficiencies for the single-mode operation of a quantum optical nonlinear shift gate
    Phys. Rev. A 70,013810/1-013810/6 (2004)
    Details
  5. H. F. Hofmann
    Generation of highly nonclassical n-photon polarization states by superbunching at a photon bottleneck
    Phys. Rev. A 70,023812/1-023812/7 (2004)
  6. S. Takeuchi, R. Okamoto and K. Sasaki
    High-yield single-photon source using gated spontaneous parametric downconversion
    Appl. Opt. 43,30,5708-5711 (2004)
  7. H. Oka, H. F. Hofmann, S. Takeuchi and K. Sasaki
    Effects of decoherence on the nonlinear optical phase shift obtained from a one-dimensional atom
    Jpn. J. Appl. Phys. 43,11A,7495-7500 (2004)
  8. K. Kojima, H. F. Hofmann, S. Takeuchi and K. Sasaki
    A study on the shape of two-photon wavefunctions after the nonlinear interaction with a one-dimensional atom
    Nonlinear Optics, Quantum Optics 32,4,221-245
Page Top

2003

         
  1. H. F. Hofmann, K. Kojima, S. Takeuchi and K. Sasaki
    Optimized phase switching using a single atom nonlinearity
    Journal of Optics B: Quantum and semiclassical optics. 5, 218-221 (2003)
  2. K. Kojima, H. F. Hofmann, S. Takeuchi and K. Sasaki
    Nonlinear interaction of two photons at a one-dimensional atom: spatiotemporal quantum coherence in the emitted field
    Phys. Rev. A. 68, 1, 013803/1-013803/13 (2003)
    Details
  3. H. F. Hofmann
    Uncertainty characteristics of generalized quantum measurements
    Phys. Rev. A. 67, 022106/1-022106/8 (2003)
  4. H. F. Hofmann and S. Takeuchi
    Violation of local uncertainty relations as a signature of entanglement
    Phys. Rev. A. 68, 032103/1-032103/6 (2003)
    Details
  5. H. F. Hofmann, K. Kojima, S. Takeuchi and K. Sasaki
    Entanglement and four wave mixing effects in the dissipation free nonlinear interaction of two photons at a single atom
    Phys. Rev. A. 68, 043813/1-043813/7 (2003)
    Details
  6. H. F. Hofmann
    Bound entangled states violate a nonsymmetric local uncertainty relation
    Phys. Rev. A. 68, 034307/1-034307/4 (2003)
Page Top

2002

  1. K. Tsujino, S. Takeuchi and K. Sasaki
    Detailed analysis of the fidelity of quantum teleportation using photons: considering real experimental parameters
    Phys. Rev. A. 66, 4, 042314/1-042314/6 (2002)
    Details
  2. H. F. Hofmann and S. Takeuchi
    Quantum phase gate for photonic qubits using only beam splitters and postselection
    Phys. Rev. A. 66, 024308/1-024308/3 (2002)
    Details
  3. H. F. Hofmann and S. Takeuchi
    Quantum filter for nonlocal polarization properties of photonic qubits
    Phys. Rev. Lett. 88, 14, 147901/1-147901-4 (2002)
    Details
  4. T. Ide, Holger F. Hofmann, A. Furusawa, T. Kobayashi
    Gain tuning and fidelity in continuous-variable quantum teleportation
    Phys. Rev. A. 65, 062303/1-062303/7 (2002)
  5. Holger F. Hofmann
    Causality in quantum teleportation: Information extraction and noise effects in entanglement distribution
    Phys. Rev. A. 66, 032317/1-032317/1 (2002)
  6. S. Takeuchi
    I wish to be a photon juggler
    JSAP International(Japan Society of Applied Physics International), 7, 25-26 (2002)
  7. S. Takeuchi
    Chemistry of nanomolecular systems: towards the realization of nanomolecular devices Chap. 11:
    Nanodevices for quantum compution using photons
    Springer (2002)
Page Top

2001

  1. S. Takeuchi
    A Simple quantum computer: experimental realization of quantum computation algorithms with linear optics
    Electronics and Communications in Japan. 84, 3, 52-59 (2001)
  2. S. Takeuchi
    Beamlike twin-photon generation using type II parametric downconversion
    Opt. Lett. 26, 11, 843-845 (2001)
  3. Holger F. Hofmann, T. Ide, T. Kobayashi and A. Furusawa
    Information losses in continuous-variable quantum teleportation
    Phys. Rev. A, 64, 040301/1-040301/4 (2001)
  4. T. Ide, Holger F. Hofmann, T. Kobayashi and A. Furusawa
    Continuous-variable teleportation of single-photon states
    Phys. Rev. A, 65, 012313/1-012313/5 (2001)
  5. T. Hasegawa, T. Nishioka, H.Ishizuka, J.Abe, K. Shimizu, M. Matsui and S. Takeuchi
    An experimental realization of quantum cryptosystem
    IEICE Trans. Fundamentals. E85-A, 1, 149-157 (2001)
Page Top

2000

  1. S. Takeuchi
    Experimental demonstration of a three-qubit quantum computation algorithm using a single photon and linear optics
    Phys. Rev. A. 62, 032301/1-032301/4 (2000)
    Details
  2. S. Takeuchi
    Analysis of errors in linear-optics quantum computation
    Phys. Rev. A. 61, 052302/1-052302/15 (2000)
    Details
Page Top

1999

  1. S. Takeuchi, J. Kim, Y. Yamamoto, and H. H. Hogue,
    Development of a High-Quantum-Efficiency Single-Photon Counting System
    Appl. Phys. Lett. 74, 1063-1065 (1999)
    Details
  2. J. Kim, S. Takeuchi, Y. Yamamoto, and H. H. Hogue,
    Multiphoton detection using visible light photon counter
    Appl. Phys. Lett. 74, 902-904 (1998)
    Details
Page Top

1997

  1. S. Takeuchi, M. Fukuoka, Y. Gomi, M. Maeda, and H. Watanabe
    An application of magnetic resonance imaging to the real time measurement of the change of moisture profile in a rice grain during boiling
  2. S. Takeuchi, M. Maeda, Y. Gomi, M. Fukuoka, and H. Watanabe
    The change of moisture distribution in a rice grain during boiling as observed by NMR imaging Journal of Food Engineering. 33, 281-297 (1997)
pagetop