Pathway selectivity in time-resolved spectroscopy using two-photon coincidence
counting with quantum entangled photons.
Yuta Fujihashi, Akihito Ishizaki, and Ryosuke Shimizu Journal of Chemical Physics 160, 104201/1-8 (2004).
Short interference fringe and high event rate of two-photon interference
using up-converted photon pairs.
Atsushi Syouji, Ryosuke Shimizu, Shigehiro Nagano, Koji Suizu, and Keiichi Edamatsu Jpn. J. Appl. Phys. 62, 022003/1-4 (2023).
Two-photon spectral modulation via temporal manipulation: Quantum optical
synthesis of spectral modes from temporal square waves.
Rui-Bo Jin, Hiroki Oshima, Takumi Yagisawa, Masahiro Yabuno, Shigehito Miki, Fumihiro China, Hirotaka Terai, and Ryosuke Shimizu Appl. Phys. Lett. 121, 244002/1-8 (2022).
Ultrafast measurement of a single-photon wave packet using an optical Kerr
gate.
Masahiro Yabuno, Takahiro Takumi, Fumihiro China, Shigehito Miki, Hirotaka
Terai, Peter J. Mosley, Rui-Bo Jin, and Ryosuke Shimizu Opt. Express 30, 4999-5007 (2022).
Broadband-laser-diode pumped periodically poled potassium titanyl phosphate-Sagnac
polarization-entangled photon source.
Neng Cai, Wu-Hao Cai, Shun Wang, Fang Li, Ryosuke Shimizu, and Rui-Bo Jin J. Opt. Soc. Am. B 39, 77-82 (2022).
Mid-infrared spectrally-uncorrelated biphotons generation from doped PPLN:
a theoretical investigation.
Bei Wei, Wu-Hao Cai, Chunling Ding, Guang-Wei Deng, Ryosuke Shimizu, Qiang
Zhou, and Rui-Bo Jin Opt. Express 29, 256-271 (2021).
Group key agreement over free-space optical links.
Hiroyuki Endo, Mikio Fujiwara, Mitsuo Kitamura, Orie Tsuzuki, Ryosuke Shimizu,
Masahiro Takeoka, and Masahide Sasaki OSA Continuum 3, 2525-2543 (2020).
Generation of pseudo-sunlight via quantum entangled photons and the interaction
with molecules.
Yuta Fujihashi, Ryosuke Shimizu, and Akihito Ishizaki Phys. Rev. Research 2, 023256/1-7 (2020).
Spectrally uncorrelated biphotons generated from "the family of BBO
crystal".
Rui-Bo Jin, Wu-Hao Cai, Chunling Ding, Feng Mei, Guang-Wei Deng, Ryosuke Shimizu, Qiang Zhou Quant. Eng. 2, e38/1-15 (2020).
Theoretical investigation of a spectrally pure-state generation from isomorphs
of KDP crystal at near-infrared and telecom wavelengths. Rui-Bo Jin, Neng Cai, Ying Huang, Xiang-Ying Hao, Shun
Wang, Fang Li, Hai-Zhi Song, Qiang Zhou, and Ryosuke
Shimizu, Phys. Rev. Appl. 11, 034067/1-9 (2019).
Direct
generation of frequency-bin entangled photons via two-period
quasi-phase-matched parametric downconversion.
Fumihiro Kaneda, Hirofumi Suzuki, Ryosuke Shimizu, and Keiichi Edamatsu, Opt. Express 27 (2), 1416-1424 (2019). (UEC メディアリリース)
Quantum
manipulation of biphoton spectral distributions in a 2D frequency space toward
arbitrary shaping of a biphoton wave packet.
Rui-Bo Jin, Ryoji Shiina, and Ryosuke Shimizu, Opt. Express 26 (16), 21153-21158 (2018).
Pulsed Sagnac polarization-entangled photon source with a PPKTP crystal at telecom wavelength.
Rui-Bo Jin, Ryosuke Shimizu, Kentaro Wakui, Mikio Fujiwara, Taro Yamashita,
Shigehito Miki, Hirotaka Terai, Zhen Wang, and Masahide Sasaki, Opt. Express 22 (10), 11498-11507 (2014).
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, 012324/1-4 (2013).
Nonclassical interference between independent intrinsically pure single
photons at telecom wavelength.
Rui-Bo Jin, Kentaro Wakui, Ryosuke Shimizu, Hugo Benichi, Shigehito Miki,
Taro Yamashita, Hirotaka Terai, Zhen Wang, Mikio Fujiwara, and Masahide
Sasaki, Phys. Rev. A 87, 063801/1-4 (2013).
Widely tunable single photon source with high purity at telecom wavelength.
Rui-Bo Jin, Ryosuke Shimizu, Kentaro Wakui, Hugo Benichi, and Masahide
Sasaki, Opt. Express 21(9), 10659-10666 (2013).
(Selected for publication in the Virtual Journal for Biomedical Optics)
Experimental Activation of Bound Entanglement. Fumihiro Kaneda, Ryosuke Shimizu, Satoshi Ishizaka, Yasuyoshi Mitsumori,
Hideo Kosaka, and Keiichi Edamatsu, Phys. Rev. Lett. 109, 040501/1-4 (2012).
Four-photon quantum interferometry at a telecom wavelength.
Masahiro Yabuno, Ryosuke Shimizu, Yasuyoshi Mitsumori, Hideo Kosaka, and
Keiichi Edamatsu, Phys. Rev. A 86, 010302(R)/1-4 (2012).
Entangled photon generation in two-period quasi-phase-matched parametric
down-conversion.
Wakana Ueno, Fumihiro Kaneda, Hirofumi Suzuki, Shigehiro Nagano, Atsushi
Syouji, Ryosuke Shimizu, Koji Suizu, and Keiichi Edamatsu, Opt. Express 20(5), 5508-5517 (2012).
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 Keiichi Eamatsu, Phys. Rev. A 83, 031805(R)/1-4 (2011).
Up-conversion dynamics for temporally entangled two-photon pulses.
Masatoshi Nakatani, Ryosuke Shimizu, and Kazuki Koshino, Phys. Rev. A 83, 013824/1-6 (2011).
Efficient up-conversion detection of 1550 nm photons using bulk periodically-poled LiNbO3.
Atsushi Syouji, Shigehiro Nagano, Ryosuke Shimizu, Koji Suizu, and Keiichi
Edamatsu, Jpn. J. Appl. Phys. 49, 040213/1-3 (2010).
All-optical phase modulations in a silicon wire waveguide at ultra-low light levels.
Nobuyuki Matsuda, Ryosuke Shimizu, Yasuyoshi Mitsumori, Hideo Kosaka, Aya
Sato, Hiroyuki Yokoyama, Koji Yamada, Toshifumi Watanabe, Tai Tsuchizawa,
Hiroshi Fukuda, Seiichi Itabashi, and Keiichi Edamatsu, Appl. Phys. Lett. 95, 171110/1-3 (2009).
Observation of optical-fibre Kerr nonlinearity at the single-photon level.
Nobuyuki Matsuda, Ryosuke Shimizu, Yasuyoshi Mitsumori, Hideo Kosaka, and
Keiichi Edamatsu, Nat. Photon. 3, 95-98 (2009).
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, 032338/1-4 (2008).
800-nm band cross-polarized photon pair source using type-II parametric down-conversion in periodically poled lithium niobate. Shigehiro Nagano, Ryosuke Shimizu, Yohei Sugiura, Koji Suizu, Keiichi Edamatsu, and Hiromasa
Ito, Jpn. J. Appl. Phys. 46, L1064-L1067 (2007).
Lossless all-optical phase gate using a polarization-division Sagnac interferometer
applicable to a waveguide-type Kerr medium.
Nobuyuki Matsuda, Yasuyoshi Mitsumori, Hideo Kosaka, Keiichi Edamatsu,
and Ryosuke Shimizu, Appl. Phys. Lett. 91, 171119/1-3 (2007).
Photon polarization entanglement induced by biexciton: experimental evidence
for violation of Bell's inequality.
Goro Oohata, Ryosuke Shimizu, and Keiichi Edamatsu, Phys. Rev. Lett. 98, 140503/1-4 (2007).
Quantum diffraction and interference of spatially correlated photon pairs and its Fourier-optical analysis.
Ryosuke Shimizu, Keiichi Edamatsu, and Tadashi Itoh, Phys. Rev. A 74, 013801/1-10 (2006).
Generation of ultraviolet entangled photons in a semiconductor.
Keiichi Edamatsu, Goro Oohata, Ryosuke Shimizu, and Tadashi Itoh, Nature 431, 167-170 (2004).
Quantum diffraction and interference of spatially correlated photon pairs
generated by spontaneous parametric down-conversion.
Ryosuke Shimizu, Keiichi Edamatsu, and Tadashi Itoh, Phys. Rev. A 67, 041805(R)/1-4 (2003).
Measurement of the photonic de Broglie wavelength of entangled photon pairs generated by spontaneous parametric down-conversion.
Keiichi Edamatsu, Ryosuke Shimizu, and Tadashi Itoh, Phys. Rev. Lett. 89, 213601/1-4 (2002).
GENERATOR OF POLARIZATION ENTANGLED PHOTON PAIRS AND METHOD OF GENERATING
THE SAME.
Ryosuke Shimizu, Keiichi Edamatsu,
米国特許 US 8,488,231 (2013年7月16日),
欧州特許 EP 2,439,585 (2014年4月30日).
NON-DEGENERATE POLARIZATION-ENTANGLED PHOTON PAIR GENERATION AND NON-DEGENERATE
POLARIZATION-ENTANGLED PHOTON PAIR GENERATION METHOD.
Ryosuke Shimizu, Keiichi Edamatsu, Shigehiro Nagano,
米国特許 US 8,173,982 (2012年5月8日),
欧州特許 EP 2,233,971 (2010年9月29日).
QUANTUM ENTANGLEMENT PHOTON-PAIR PRODUCING DEVICE AND QUANTUM ENTANGLEMENT
PHOTON PAIR PRODUCING METHOD.
Ryosuke Shimizu, Keiichi Edamatsu,
米国特許 US 7,570,419 (2009年8月4日).
OPTICAL NONLINEAE EVALUATION DEVICE AND OPTICAL SWITCHING ELEMENT.
Ryosuke Shimizu, Keiichi Edamatsu, Nobuyuki Matsuda,
米国特許 US 7,652,770 (2010年1月26日).