Prof. Shigeki Takeuchi Profile

Prof. Shigeki Takeuchi

Professor at Kyoto Univ

SPIE Involvement:

Conference Program Committee | Author

Publications (27)

Proceedings Article | 13 March 2024 Presentation + Paper

Ultra-broadband quantum infrared spectroscopy

Toshiyuki Tashima, Yu Mukai, Ryo Okamoto, Masaya Arahata, Norihide Oda, Mamoru Hisamitsu, Katsuhiko Tokuda, Shigeki Takeuchi

Proceedings Volume 12912, 1291216 (2024) https://doi.org/10.1117/12.3012135

KEYWORDS: Infrared spectroscopy, Quantum entanglement, Visible radiation, Quantum systems, Quantum devices, Transmittance, Spectroscopy, Quantum technologies, Quantum sensing, Quantum detection

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Proceedings Article | 4 October 2023 Presentation

Generation and manipulation of broadband frequency entangled photons

Shigeki Takeuchi, Ryo Okamoto, Bo Cao

Proceedings Volume PC12692, PC1269206 (2023) https://doi.org/10.1117/12.2676670

KEYWORDS: Photons, Quantum frequencies, Quantum entanglement, Quantum sensing, Quantum interference, Quantum imaging, Optical coherence tomography, Visibility, Quantum optics experiments, Quantum limits

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Proceedings Article | 4 October 2023 Presentation

Effect of pump laser linewidth on nonlinear quantum interferometric fringes

Jasleen Kaur, Yu Mukai, Ryo Okamoto, Shigeki Takeuchi

Proceedings Volume PC12692, PC1269205 (2023) https://doi.org/10.1117/12.2676594

KEYWORDS: Signal to noise ratio, Quantum interferometry, Laser interferometry, Pulsed laser operation, Visibility, Laser frequency, Continuous wave operation, Quantum frequencies, Quantum experiments, Spectroscopy

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Proceedings Article | 9 March 2022 Presentation

Efficient generation and evaluation of single photons propagating in the multiple optical modes

Shigeki Takeuchi, Takayuki Kiyohara, Ryo Okamoto

Proceedings Volume PC12015, PC1201516 (2022) https://doi.org/10.1117/12.2613930

KEYWORDS: Single photon, Quantum efficiency, Optical switching, Tomography, Quantum circuits, Photons, Photonic integrated circuits, Entangled states

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Proceedings Article | 1 August 2021 Presentation

Efficient analysis of entangled photons and single photons

Shigeki Takeuchi

Proceedings Volume 11835, 118350Q (2021) https://doi.org/10.1117/12.2593863

KEYWORDS: Photons, Single photon, Quantum efficiency, Tomography, Entangled states

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Proceedings Article | 1 August 2021 Presentation

A wavelength variable visible-infrared photon pair source using a LiNbO3 crystal in the mid-infrared region

Masaya Arahata, Yu Mukai, Bo Cao, Toshiyuki Tashima, Ryo Okamoto, Shigeki Takeuchi

Proceedings Volume 11835, 1183506 (2021) https://doi.org/10.1117/12.2594340

KEYWORDS: Mid-IR, Crystals, Photonic crystals, Infrared spectroscopy, Visible radiation, Photodetectors, Infrared radiation, Infrared imaging, FT-IR spectroscopy, Absorption spectroscopy

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Proceedings Article | 20 August 2020 Presentation

Nanofiber integrated single light emitters for efficient single photon sources

Shigeki Takeuchi

Proceedings Volume 11507, 115070M (2020) https://doi.org/10.1117/12.2568421

KEYWORDS: Single photon, Nanofibers, Optical fibers, Light, Photonic devices, Quantum networks, Quantum efficiency, Tapered optical fibers, Transmittance, Photons

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Proceedings Article | 6 November 2018 Presentation

Realization of high-speed adaptive quantum state estimation (Conference Presentation)

Saki Nohara, Ryo Okamoto, Koichi Yamagata, Akio Fujiwara, Shigeki Takeuchi

Proceedings Volume 10771, 107710J (2018) https://doi.org/10.1117/12.2320921

KEYWORDS: Photons, Statistical analysis, Polarization, Wave plates, Quantum communications, Life sciences, Liquid crystals

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Proceedings Article | 29 May 2018 Presentation

Single photon extraction from defects in hBN using a tapered fiber (Conference Presentation)

Andreas Schell, Toan Trong Tran, Hideaki Takashima, Igor Aharonovich, Shigeki Takeuchi

Proceedings Volume 10674, 106740K (2018) https://doi.org/10.1117/12.2307460

KEYWORDS: Single photon, Photonics, Quantum efficiency, Quantum optics, Photons, Singular optics, Sensors, Boron, Tapered optical fibers, Nanomanipulation

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Proceedings Article | 23 May 2018 Presentation

Investigation of the optical properties of single emitters in hBN (Conference Presentation)

Andreas Schell, Mikael Svendahl, Toan Trong Tran, Igor Aharonovich, Hideaki Takashima, Shigeki Takeuchi, Romain Quidant

Proceedings Volume 10672, 106721G (2018) https://doi.org/10.1117/12.2307402

KEYWORDS: Optical properties, Single photon, Photonics, Boron, Pulsed laser operation, Nonlinear optics, Biosensors, Quantum efficiency

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Proceedings Article | 28 April 2017 Presentation

Efficient extraction of photons from a single defect in hBN using a nanofiber (Conference Presentation)

Andreas Schell, Trong Toan Tran, Igor Aharonovich, Hideaki Takashima, Shigeki Takeuchi

Proceedings Volume 10111, 101112V (2017) https://doi.org/10.1117/12.2251879

KEYWORDS: Singular optics, Sensors, Tapered optical fibers, Single photon, Photons, Nanofibers, Boron, Quantum efficiency, Quantum optics, Photonics

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Proceedings Article | 21 April 2017 Presentation

Nanofiber Bragg grating cavities (Conference Presentation)

Andreas Schell, Hideaki Takashima, Hironaga Maruya, Atsushi Fukuda, Shigeki Takeuchi

Proceedings Volume 10090, 100900N (2017) https://doi.org/10.1117/12.2251275

KEYWORDS: Photons, Nanofibers, Ion beams, Fiber Bragg gratings, Gallium, Light, Chemical species, Molecules, Optical fibers, Quantum optics

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Proceedings Article | 19 April 2017 Presentation

Nonlinear excitation of single quantum emitters in hexagonal boron nitride (Conference Presentation)

Andreas Schell, Trong Toan Tran, Igor Aharonovich, Hideaki Takashima, Shigeki Takeuchi

Proceedings Volume 10102, 1010214 (2017) https://doi.org/10.1117/12.2251262

KEYWORDS: Nonlinear optics, Current controlled current source, Boron, Quantum optics, Luminescence, Nanophotonics, Image resolution, Optical imaging, Ultrafast phenomena

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Proceedings Article | 7 December 2016 Presentation

An excess-photon suppressed heralded single photon source combining multiple down-converters and cascaded detectors (Conference Presentation)

Takayuki Kiyohara, Ryo Okamoto, Shigeki Takeuchi

Proceedings Volume 9980, 99800C (2016) https://doi.org/10.1117/12.2237630

KEYWORDS: Photons, Sensors, Single photon, Visibility, Quantum information, Integrated optics, Photonic integrated circuits, Signal detection, Quantum communications, Current controlled current source

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Proceedings Article | 7 December 2016 Presentation

Realization of a quantum controlled-SWAP gate with photonic circuits (Conference Presentation)

Shigeki Takeuchi, Takafumi Ono, Ryo Okamoto, Masato Tanida, Holger Hofmann

Proceedings Volume 9980, 99800B (2016) https://doi.org/10.1117/12.2237398

KEYWORDS: Quantum information, Quantum circuits, Photonic integrated circuits, Data storage, Superposition, Quantum communications, Data processing, Precision measurement, Visibility

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Proceedings Article | 15 March 2016 Paper

Ultrathin fiber-taper coupling with nitrogen vacancy centers in nanodiamonds at cryogenic temperatures

Masazumi Fujiwara, Hong-Quan Zhao, Tetsuya Noda, Kazuhiro Ikeda, Hitoshi Sumiya, Shigeki Takeuchi

Proceedings Volume 9762, 97620X (2016) https://doi.org/10.1117/12.2206144

KEYWORDS: Cryogenics, Diamond, Nitrogen, Quantum information, Chemical species, Photons, Fiber couplers, Nanofibers, Solid state physics, Metrology, Luminescence, Microscopes, Laser scattering, Objectives

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Proceedings Article | 29 March 2013 Paper

Spectral properties of ultra-broadband entangled photons generated from chirped-MgSLT crystal towards monocycle entanglement generation

Akira Tanaka, Ryo Okamoto, Hwan Hong Lim, Shanthi Subashchandran, Masayuki Okano, Labao Zhang, Lin Kang, Jian Chen, Peiheng Wu, Toru Hirohata, Sunao Kurimura, Shigeki Takeuchi

Proceedings Volume 8635, 86350X (2013) https://doi.org/10.1117/12.2003390

KEYWORDS: Photons, Crystals, Luminescence, Phase compensation, Terahertz radiation, Superconductors, Single photon detectors, Indium gallium arsenide, Monochromators, Photomultipliers

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Proceedings Article | 23 February 2012 Paper

Suppression of phonon sidebands in the spectrum of nitrogen vacancy centers in diamond nano-crystals

Hong-Quan Zhao, Masazumi Fujiwara, Shigeki Takeuchi

Proceedings Volume 8272, 82720W (2012) https://doi.org/10.1117/12.906638

KEYWORDS: Silicon, Phonons, Diamond, Temperature metrology, Glasses, Luminescence, Cryogenics, Crystals, Nitrogen, Silica

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Proceedings Article | 23 February 2012 Paper

Near-field coupling of a single NV center to a tapered fiber

Tim Schröder, Masazumi Fujiwara, Tetsuya Noda, Hong-Quan Zhao, Andreas Schell, Günter Kewes, Oliver Benson, Shigeki Takeuchi

Proceedings Volume 8272, 827209 (2012) https://doi.org/10.1117/12.907961

KEYWORDS: Single photon, Luminescence, Near field, Fiber couplers, Nitrogen, Optical filters, Quantum information, Fiber lasers, Confocal microscopy, Near field optics

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Proceedings Article | 21 January 2012 Paper

Spectral dependence of ultra-low dark count superconducting single photon detector for the evaluation of broadband parametric fluorescence

Shanthi Subashchandran, Ryo Okamoto, Akira Tanaka, Masayuki Okano, Labao Zhang, Lin Kang, Jian Chen, Peiheng Wu, Shigeki Takeuchi

Proceedings Volume 8268, 82681V (2012) https://doi.org/10.1117/12.906534

KEYWORDS: Luminescence, Single photon detectors, Superconductors, Fiber couplers, Linear filtering, Signal detection, Mid-IR, Single mode fibers, Absorption, Nanowires

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Proceedings Article | 7 September 2011 Paper

Generation of broadband spontaneous parametric fluorescence and its application to quantum optical coherence tomography

Masayuki Okano, Ryo Okamoto, Akira Tanaka, Shanthi Subashchandran, Shutaro Ishida, Norihiko Nishizawa, Shigeki Takeuchi

Proceedings Volume 8163, 816312 (2011) https://doi.org/10.1117/12.893213

KEYWORDS: Optical coherence tomography, Luminescence, Dispersion, Nonlinear crystals, Light sources, Crystals, Signal detection, Mirrors, Interferometers, Photonic crystals

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Proceedings Article | 19 February 2011 Paper

Polarization-purity spectra of a tapered-fiber-coupled microsphere cavity system at cryogenic temperatures

Masazumi Fujiwara, Akira Tanaka, Kiyota Toubaru, Hong-Quan Zhao, Hideaki Takashima, Shigeki Takeuchi

Proceedings Volume 7913, 791317 (2011) https://doi.org/10.1117/12.874587

KEYWORDS: Polarization, Cryogenics, Temperature metrology, Optical microcavities, Diamond, Single mode fibers, Solid state physics, Silica, Cooling systems, Helium

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Proceedings Article | 30 August 2010 Paper

How can we minimize errors in a linear-optics quantum gate?

Tomohisa Nagata, Ryo Okamoto, Masato Tanida, Holger Hofmann, Shigeki Takeuchi

Proceedings Volume 7815, 78150E (2010) https://doi.org/10.1117/12.868214

KEYWORDS: Error analysis, Reflectivity, Polarization, Quantum communications, Current controlled current source, Beam splitters, Phase shifts, Birefringence, Optical components, Photons

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Proceedings Article | 26 August 2009 Paper

Analysis of errors in an optical controlled-NOT gate

Tomohisa Nagata, Ryo Okamoto, Keiji Sasaki, Shigeki Takeuchi

Proceedings Volume 7465, 746513 (2009) https://doi.org/10.1117/12.829607

KEYWORDS: Error analysis, Beam splitters, Photons, Reflectivity, Polarization, Optical components, Single photon, Phase shifts, Quantum communications, Analytical research

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Proceedings Article | 15 September 2005 Paper

Quantum phase gate using single atom nonlinearlity

Shigeki Takeuchi, Hisaki Oka, Kunihiro Kojima, Holger Hofmann, Keiji Sasaki

Proceedings Volume 5893, 58930K (2005) https://doi.org/10.1117/12.618045

KEYWORDS: Chemical species, Systems modeling, Mirrors, Phase shifts, Finite-difference time-domain method, Quantum computing, Complex systems, Quantum cryptography, Nonlinear optics, Photodetectors

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Proceedings Article | 19 October 2004 Paper

Distinguishing genuine entangled two-photon polarization states from independently generated pairs of entangled photons

Shigeki Takeuchi, Kenji Tsujino, Holger Hofmann, Keiji Sasaki

Proceedings Volume 5551, (2004) https://doi.org/10.1117/12.562101

KEYWORDS: Photon polarization, Polarization, Quantum communications

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Proceedings Article | 3 February 2004 Paper

Single photon source using parametric down conversion

Shigeki Takeuchi, Ryo Okamoto, Keiji Sasaki

Proceedings Volume 5161, (2004) https://doi.org/10.1117/12.505296

KEYWORDS: Single photon, Camera shutters, Signal detection, Quantum cryptography, Photonic crystals, Luminescence, Photodetectors, Signal attenuation, Light, Crystals

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Showing 5 of 27 publications

Conference Committee Involvement (21)

Quantum Communications and Quantum Imaging XXIII

3 August 2025 | San Diego, California, United States

Quantum Communications and Quantum Imaging XXII

18 August 2024 | San Diego, California, United States

Quantum Communications and Quantum Imaging XXI

21 August 2023 | San Diego, California, United States

Quantum Communications and Quantum Imaging XX

21 August 2022 | San Diego, California, United States

Quantum Communications and Quantum Imaging XIX

3 August 2021 | San Diego, California, United States

Quantum Communications and Quantum Imaging XVIII

24 August 2020 | Online Only, California, United States

Quantum Communications and Quantum Imaging XVII

11 August 2019 | San Diego, California, United States

Quantum Communications and Quantum Imaging XVI

19 August 2018 | San Diego, California, United States

Quantum Communications and Quantum Imaging XV

6 August 2017 | San Diego, California, United States

Quantum Communications and Quantum Imaging XIV

28 August 2016 | San Diego, California, United States

Quantum Communications and Quantum Imaging XIII

9 August 2015 | San Diego, California, United States

Quantum Communications and Quantum Imaging XII

18 August 2014 | San Diego, California, United States

Quantum Communications and Quantum Imaging XI

26 August 2013 | San Diego, California, United States

Quantum Communications and Quantum Imaging X

15 August 2012 | San Diego, California, United States

Quantum Communications and Quantum Imaging IX

24 August 2011 | San Diego, California, United States

Quantum Communications and Quantum Imaging VIII

4 August 2010 | San Diego, California, United States

Quantum Communications and Quantum Imaging VII

4 August 2009 | San Diego, California, United States

Quantum Communications and Quantum Imaging VI

12 August 2008 | San Diego, California, United States

Quantum Communications and Quantum Imaging V

26 August 2007 | San Diego, California, United States

Quantum Communications and Quantum Imaging IV

13 August 2006 | San Diego, California, United States

Quantum Communications and Quantum Imaging III

2 August 2005 | San Diego, California, United States

Showing 5 of 21 Conference Committees

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