2022年度

"Efficient and broadband generation of visible-infrared entangled photon pairs using a ridge waveguide quasi-phase-matched device"（ポスター）
M. Arahata, B. Cao, Y. Mukai, T. Tashima, M. Hisamitsu, K. T Okuda, R. Okamoto, S. Takeuchi
International Symposium on Creation of Advanced Photonic and Electronic Devices 2023, March 14, 2023

"Analysis of Conditional Quantum Coherence in Two-photon Multi-mode States Beyond Linear Optical Limits"（ポスター）
G. Park, R. Okamoto, H. F. Hofmann, S. Takeuchi
International Symposium on Creation of Advanced Photonic and Electronic Devices 2023, March 14, 2023

"Creation of Single SiV Centers in Nanodiamonds by Ion Implantation"（ポスター）
K. Shimazaki, K. Suzuki, H. Takashima, H. Abe, T. Ohshima, S. Takeuchi
International Symposium on Creation of Advanced Photonic and Electronic Devices 2023, March 14, 2023

"Effect of Pump Laser Linewidth on Nonlinear Quantum Interferometic Fringes"（ポスター）
J. Kaur, Y. Mukai, R. Okamoto, S. Takeuchi
International Symposium on Creation of Advanced Photonic and Electronic Devices 2023, March 14, 2023

"Petal-Shaped Beam Generation for a Two-dimensional Quantum Walk with Helical Boundary Conditions"（ポスター）
Y. Okamoto, H. Obuse, S. Takeuchi ,R. Okamoto
International Symposium on Creation of Advanced Photonic and Electronic Devices 2023, March 14, 2023

"Quantum science and technology using entangled photons"（口頭）
S. Takeuchi
The 23rd RIES-Hokudai International Symposium拓[Taku] , December 5, 2022

"Creation of Silicon Vacancy Centers in Detonation Nanodiamonds by High Temperature Annealing"（ポスター）
K. Shimazaki, H. Kawaguchi, H. Takashima, T. Segawa, F. So, D. Terada, S. Onoda, T. Ohshima, S. Takeuchi
The 23rd RIES-Hokudai International Symposium拓[Taku], December 5, 2022

"Highly efficient and ultra-broadband photon pair source using chirped quasiphase matching slab waveguide matching slab waveguide"（口頭）
B. Cao, K. Hayama, S. Suezawa, M. Hisamitsu, K. Tokuda, S. Kurimura, R. Okamoto, S.T akeuchi
5th IFQMS / QI 2022, November 29, 2022

"Effect of pump laser linewidth on nonlinear quantum interferometric fringes"（口頭）
J. Kaur, Y. Mukai, R. Okamoto, S. Takeuchi
5th IFQMS / QI 2022, November 29, 2022

"Evaluation of a superconducting nanowire single photon detector for mid-infrared wavelengths"（口頭）
S. Mima, F. China, M. Yabuno, S. Miyajima, S. Miki, Y. Gama, T. Tashima, M. Arahata, Y. Mukai, R. Okamoto, S. Takeuch, H. Terai
5th IFQMS / QI 2022, November 29, 2022

"Efficient superconducting nanostrip single-photon detectors for 2 μm wavelength"（口頭）
F. China, S. Mima, S. Miki, M. Yabuno, S. Miyajima, H. Terai
5th IFQMS / QI 2022, November 29, 2022

"Development of superconducting nanostrip single-photon detectors for 2 ㎛ wavelength"（ポスター）
F. China, S. Mima, S. Miki, M. Yabuno, S. Miyajima, H. Terai
The Applied Superconductivity Conference（ASC2022）, October 25, 2022

"Experimental generation of two-photon three-mode non-Fock state using remote state preparation"（口頭）
G. Park, R. Okamoto, H. F. Hofmann, S. Takeuchi
APPC15, August 25, 2022

"Photonic quantum sensing: from absorption measurement to quantum state estimation"（口頭）
R. Okamoto
APPC15, August 24, 2022

"The effect of the finite linewidth of the pump laser on a nonlinear quantum interferometer"（ポスター）
J. Kaur, Y. Mukai, R. Okamoto, S. Takeuchi
APPC15, August 24, 2022

"Frequency-entangled photon sources and their application to quantum sensing"（口頭）
S. Takeuchi
SPIE Optics+Photonics 2022, August 21, 2022

"Quantum Fourier-transform infrared spectroscopy in the far-infrared region"（口頭）
Y. Mukai, R. Okamoto, S. Takeuchi
CLEO-PR2022/ISOM'22/ODF'22, August 4, 2022

"Creation of Sillicon Vacancy Center in Detonation Nanodiamonds by High Temperature Annealing"（口頭）
K. Shimazaki, H. Kawaguchi, H. Takashima, T. Segawa, F. So, D. Terada, S. Onoda, T. Ohshima, M. Shirakawa, S. Takeuchi
CLEO-PR2022/ISOM'22/ODF'22, August 4, 2022

"Development of next generation superconducting nanostrip single photon detection technology"（ポスター）
S. Miki, M. Yabuno, S. Miyajima, F. China, H. Terai
CLEO Pacific Rim, CLEO-PR 2022, August 4, 2022

"Nanophotonics for quantum information and quantum sensing"（口頭）
H. Takashima, A. Fukuda, H. Kawaguchi, K. Fukushige, K. Shimazaki, T. Tashima, S. Takeuchi
The 20th International Symposium on the Physics of Semiconductors and Applications (ISPSA2022), July 18, 2022

"High-efficiency infrared-light up-conversion detection system with picosecond time gate using repetition-synchronized fiber lasers"（ポスター）
北條真之、谷峻太郎、小林洋平、田中耕一郎
Optical Terahertz Science and Technology, June 19, 2022

2021年度

"Efficient generation and evaluation of single photons propagating in the multiple optical modes"（口頭）
S. Takeuchi, T. Kiyohara. R. Okamoto
Photonics West 2022 On Demand, February 26, 2022

"Efficient entangled photon sources and their applications"（口頭）
S. Takeuchi
Sensing with Quantum Light 754. WE-Heraeus-Seminar, September 27, 2021

"A wavelength variable visible-infrared photon pair source via spontaneous parametric downconversion in the mid-infrared region"（ポスター）
M. Arahata, Y. Mukai, T. Tashima, B. Cao, R. Okamoto, S. Takeuchi
Sensing with Quantum Light 754. WE-Heraeus-Seminar, September 27, 2021

"Complex transmittance measurements using quantum Fourier-transform infrared spectroscopy"（ポスター）
Y. Muaki, M. Arahata, T. Tashima, R. Okamoto, S.Takeuchi
Sensing with Quantum Light 754. WE-Heraeus-Seminar, September 27, 2021

"A wavelength variable visible-infared photon pair source using a LiNbO₃ crystal in the mid-infrared redion"（口頭）
M. Arahata, Y. Mukai, B. Cao, R. Okamoto, S. Takeuchi
SPIE Optical Engineering + Applications, August 2, 2021

"Efficient analysis of entangled photons and single photons"（口頭）
S. Takeuchi
SPIE Optical Engineering + Applications, August 1, 2021

"Signature of 2p exciton in hBN-encapsulated monolayer MoSe2 revealed by sum frequency generation spectroscopy"（口頭）
S. Takahashi, S. Kusaba, K. Tanaka
CLEO/Europe-EQEC 2021, June 25, 2021

"Dark Exciton Formation and Relaxation Dynamics in Monolayer WSe2"（ポスター）
S. Kusaba, K. Watanabe, T. Taniguchi, K. Yanagi, K. Tanaka
CLEO/Europe-EQEC 2021, June 23, 2021

2020年度

"Realization of sequential adaptive quantum state estimation and application to a single photon emitter"（ポスター）
S.Nohara, H.Takashima, R.Okamoto, A.Fujiwara and S.Takeuchi
International Symposium on Creation of Adcvanced Photonic and Electronic Devices 2021, March 10, 2021

"Frequency correlated photon generation at telecom band using silicon nitride ring cavities"（ポスター）
K.Sugiura, Z.Yin, H.Takashima, R.Okamoto, F.Qiu, S.Yokoyama and S.Takeuchi
International Symposium on Creation of Adcvanced Photonic and Electronic Devices 2021, March 10, 2021

"Direct observation of parametric fluorescence in the mid-infrared region using an InSb detector"（ポスター）
M.Arahata, Y.Mukai, B.Cao, T.Tashima, R.Okamoto and S.Takeuchi
International Symposium on Creation of Adcvanced Photonic and Electronic Devices 2021, March 10, 2021

"Generation of heralded non-Fock state and verification of coherence"（ポスター）
G.Park, I Matsumoto, T.Kiyohara, R.Okamoto, H F. Hofmann and S.Takeuchi
International Symposium on Creation of Adcvanced Photonic and Electronic Devices 2021, March 10, 2021

"Fablication of SiV centers inside nanodiamonds using ion implantation"（ポスター）
K.Shimazaki, H.Takashima, A.Fukuda, A.W Andreas, T.Tashima, H.Abe, S.Onoda, T.Ohshima and S.Takeuchi
International Symposium on Creation of Adcvanced Photonic and Electronic Devices 2021, March 10, 2021

"Photonic quantum sensing using frequency entangled photons-infrared quantum abosrption spectroscopy-"（口頭）
Y.Mukai,T.Tashima, B.Cao, N.Abe, R.Okamoto and S Takeuchi
The 3rd International Forum on Quantum Metrology and Sensing, December 17, 2020

"Fabrication of SiV Centers inside Nanodiamonds Using ion implantation"（口頭）
K.Shimazaki, H.Takashima, A.Fukuda, A.W Andreas, T.Tashima, H.Abe, S.Onoda, T.Ohshima and S.Takeuchi
The 3rd International Forum on Quantum Metrology and Sensing, December 17, 2020

"Demonstration of Three-Dimensional High-Resolution Quantum Optical Coherence Tomography Using Frequency-Entangled Photon Pairs"（口頭）
N.Abe, T.Horino, Y.Kawaguchi, B.Cao, R.Okamoto and S.Takeuchi
The 3rd International Forum on Quantum Metrology and Sensing, December 17, 2020

"Direct observation of parametric fluorescence in the mid-infrared region using an InSb detector"（口頭）
M.Arahata, Y.Mukai, T.Tashima, B.Cao, R.Okamoto and S.Takeuchi
The 3rd International Forum on Quantum Metrology and Sensing, December 17, 2020

"Direct generation of two frequency-entangled photon pairs by quasi-phase-matched parametric down-conversion"（口頭）
M.Hojo, K.Tanaka
The 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW), November 13, 2020

"Quantum sensing using entangled photons"（口頭）
S.Takeuchi
The 81st JSAP Autum Meeting 2020 JSAP-OSA Joint Symposia 2020, September 10, 2020

"Photonic quantum sensing using entangled photons"（口頭）
S.Takeuchi
Sensing with Quantun Light 2020, September 7, 2020

"Nanofiber integrated single light emitters for efficient single photon"（口頭）
S.Takeuchi
SPIE Optics+Photonics 2020 Digital, August 24, 2020

"Quantum sensing using entangled photons"(口頭）
S.Takeuchi
India-Japan webinar on quantum technologies, July 28, 2020

"Highly efficient broadband frequency entangled photon pair sources for optical quantum applications"（口頭）
B.Cao, K.Hayama, M.Hisamitsu, K.Tokuda, S.Kurimura, R.Okamoto and S.Takeuchi
CLEO Virtual Technical Conference, May 14, 2020

2019年度

"Experimental demonstration of adaptive quantum state estimation for dynamic quantum states"
S.Nohara, R.Okamoto, A.Fujiwara, S.Takeuchi
International Symposium on Creation of Advanced Photonic and Electronic Devices 2020, Kyoto, Japan, March 10, 2020

"Efficient coupling of Type-I degenerate parametric down converted photon pairs into a single-mode fiber"
G.Park, T.Kiyohara, R.Okamoto and S.Takeuchi
International Symposium on Creation of Advanced Photonic and Electronic Devices 2020, Kyoto, Japan, March 10, 2020

”Confirmation of the frequency correlation of the photon-pairs generated in a ring resonator”
K.Sugiura, R.Okamoto, S T.Chu, B E.Little and S.Takeuchi
International Symposium on Creation of Advanced Photonic and Electronic Devices 2020, Kyoto, Japan, March 10, 2020

"Highly Efficient Broadband Frequency Entangled-Photon Sources"
B.Cao, K.Hayama, Y.Kamei, R.Okamoto, M.Hisamitsu, K.Tokuda,and S.Takeuchi
The 2nd IFQMS, Kyoto, Japan, December 18, 2019"

"Visible-infrared Entangled Photon Sources using Periodically Poled SLT Devices"
T.Tashima,Y.Mukai, M.Arahata, Y.Gama, M.Hisamitsu, K.Tokuda, R.Okamoto and S.Takeuchi
The 2nd IFQMS, Kyoto, Japan, December 17, 2019

"Tunable Broadband Visible-Infrared Entangled Photon Source using a LiNbO₃ Crystal"
M.Arahata, B.Cao, T.Tashima, Y.Mukai, R.Okamoto and S.Takeuchi
The 2nd IFQMS, Kyoto, Japan, December 17, 2019

"Towards Broadband Infrared Quantum Absorption Spectroscopy Based on Nonlinear Interferometer"
Y.Mukai, T.Tashima, M.Arahata, R.Okamoto and S.Takeuchi
The 2nd IFQMS, Kyoto, Japan, December 17, 2019

"Quantum sensing using entangled photons"
S.Takeuchi
The 2nd IFQMS, Kyoto, Japan, December 17, 2019

"On-chip Broadband Entangled Photon Sources Using HICDG and SiN Waveguide Devices"
K.Sugiura, Z.Yin, X.Cheng, H.Takashima, R.Okamoto, L.Zhang, L.Kang, J.Chen, P.Wu, S T.Chu, B E.Little, S.Yokoyama and S.Takeuchi
The 2nd IFQMS, Kyoto, Japan, December 17, 2019

"Experimental Demonstration of Adaptive Quantum State Estimation for Dynamic Quantum States"
S.Nohara, R.Okamoto, A.Fujiwara, S.Takeuchi
The 2nd IFQMS, Kyoto, Japan, December 17, 2019

"Nanofiber integrated single light emitters for efficient single photon sources"
S.Takeuchi
ICAMD, Jeju, Korea, December 11, 2019

"Fabrication of high-Q factor nanofiber Bragg cavity using a helium ion microscope"
H.Takashima, A.Fukuda, H.Maruya, T.Tashima, A.W. Schell, and S.Takeuchi
AVS 66th ISE 2019, Munich, Germany, October 24, 2019

"Nanofiber Integrated Single Light Emitters for EfficientSingle Photon Sources"
S.Takeuchi
Laser Physics Workshop 2019, Gyeongju, Korea, July 9, 2019

"Enhanced direct optical excitation of an NV center via Nanofiber Bragg-cavity : A numerical simulation"
T.Tashima, H.Takashima and S.Takeuchi
Cleo/Europe-EQEC 2019, Munich, Germany, June 26, 2019

"Nanofiber integrated single light emitters for efficient single photon sources"
S.Takeuchi
Quantum 2019, Torino, Italy, May 31, 2019

"Time-resolved excitonic Lyman spectroscopy in diamond"
Tomoaki Ichii, Nobuko Naka, and Koichiro Tanaka
Optical Terahertz Science and Technology 2019,  Santa Fe, USA, March 9-11, 2019

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