Article
Physics, Applied
Hao Hao, Qing-Yuan Zhao, Ling-Dong Kong, Shi Chen, Hui Wang, Yang-Hui Huang, Jia-Wei Guo, Chao Wan, Hao Liu, Xue-Cou Tu, La-Bao Zhang, Xiao-Qing Jia, Jian Chen, Lin Kang, Cong Li, Te Chen, Gui-Xing Cao, Pei-Heng Wu
Summary: Photon number resolving is crucial for detectors in quantum and classical applications. By utilizing a matched filter and a cryogenic amplifier, the performance of series PNR-SNSPD can be improved, achieving a maximum resolved photon number of 65 or even larger.
APPLIED PHYSICS LETTERS
(2021)
Article
Physics, Applied
Kaori Hattori, Toshio Konno, Yoshitaka Miura, Sachiko Takasu, Daiji Fukuda
Summary: This study tested an Au/Ti (10/20 nm) bilayer TES that achieved a high energy resolution by lowering the critical temperature Tc to 115 mK. The results have important implications for improving the energy resolution in biological imaging and microscopic spectroscopy.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2022)
Article
Quantum Science & Technology
Lorenzo Stasi, Patrik Caspar, Tiff Brydges, Hugo Zbinden, Felix Bussieres, Rob Thew
Summary: Herald single-photon sources (HSPS) face the challenge of multiphoton emission, which requires a trade-off between single-photon quality and heralding rate. Photon-number-resolving (PNR) detectors are implemented to filter out heralding events with more than one photon pair, improving the HSPS.
QUANTUM SCIENCE AND TECHNOLOGY
(2023)
Article
Optics
Yansheng Bao, Bochen Wang, Qianhe Shao, Changyong Tian, Zhengyong Li
Summary: We demonstrate self-calibration of a photon-number-resolving (PNR) detector system to reduce PNR errors and optimize photon statistics distribution. Our method calibrates voltage ranges of the pulse height histogram corresponding to photon number states and optimizes photon statistics distribution without the need for standard detectors. The optimized photon statistics distributions agree with theoretical calculations and greatly reduce the relative errors of the average photon number compared to preliminary reconstruction. Our results are valuable for various PNR applications.
OPTICS COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
I. K. A. da Silva, F. A. Mendonca, R. V. Ramos
Summary: The article introduces an analytical expression for improving the performance of a multi-photon number resolving detector when measuring coherent states. By transforming the static MPNRD device into a dynamic one, it overcomes the impact of optical losses and non-unit quantum efficiency.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Physics, Applied
Peizhan Li, Jiaqiang Zhong, Wen Zhang, Zheng Wang, Qingxiao Ma, Zhifa Feng, Wei Miao, Yuan Ren, Jing Li, Qijun Yao, Shengcai Shi
Summary: This article reports a titanium (Ti) TES-based single-photon detector with high detection efficiency and photon-number resolving capability at a working wavelength of 1550 nm. The detector has a low dark count rate and can resolve up to 20 photons.
JOURNAL OF LOW TEMPERATURE PHYSICS
(2023)
Article
Chemistry, Inorganic & Nuclear
Natsumi Kimoto, Hiroaki Hayashi, Takumi Asakawa, Cheonghae Lee, Takashi Asahara, Tatsuya Maeda, Sota Goto, Yuki Kanazawa, Akitoshi Katsumata, Shuichiro Yamamoto, Masahiro Okada
Summary: This study introduces an effective method for determining atomic number (Z(eff)) based on a photon-counting technique, which corrects for beam hardening effect and detector response for high accuracy material identification. The method was demonstrated on X-ray images from an energy-resolving photon-counting detector, resulting in a Z(eff) image with an accuracy of Z(eff) +/- 0.5 regardless of mass thickness.
APPLIED RADIATION AND ISOTOPES
(2021)
Article
Optics
Shuo Li, Wenchao Li, Vladislav V. Yakovlev, Allison Kealy, Andrew D. Greentree
Summary: Achieving a fundamental understanding of biological pathways requires minimally invasive nanoscopic optical resolution imaging. In this study, a new approach is proposed by utilizing quantum measurements of photon number distributions to determine the number and probability of emission from single-photon emitters. This technique has great potential in quantum optical imaging with nanoscopic resolution.
Article
Physics, Applied
Q. Pears Stefano, A. G. Magnoni, J. Estrada, C. Iemmi, D. Rodrigues, J. Tiffenberg
Summary: We have developed an imaging device in the infrared wavelength range that can arbitrarily reduce readout noise. The device has photon-number-resolving capability, high spatial resolution, high quantum efficiency in the near-infrared, and ultralow dark counts. By reducing the readout noise to less than 0.2e-, we are able to image objects in a broad range of intensities and reveal shapes previously hidden in the noise.
PHYSICAL REVIEW APPLIED
(2023)
Article
Physics, Applied
M. Fedkevych, M. Biasotti, M. De Gerone, L. Ferrari Barusso, G. Gallucci, F. Gatti, M. Giovannini, M. Osipenko, M. Ripani, B. Siri, M. Taiuti
Summary: The TORIO-229 experiment aims to determine the transition energy of Th-229m directly, which is important for the development of a scientific clock. An array of fast transition-edge sensors (TESs) is planned to be used as a detector, which has been proven feasible in previous work. This microcalorimeter can register every possible transition channel and has a long lifetime.
JOURNAL OF LOW TEMPERATURE PHYSICS
(2022)
Article
Optics
Xiaoqin Yin, Shuzhen Fan, Xingyu Zhang, Yongfu Li, Zhaojun Liu, Xian Zhao, Jiaxiong Fang
Summary: This paper investigates the impact of sum-frequency and difference-frequency conversion on upconversion terahertz-wave detection using organic crystals. Previous studies have disregarded the concurrent effects of these processes, leading to discrepancies between theoretical simulations and experimental results. The proposed four-wave interaction equations analyze the role of sum-frequency conversion, and experimental results confirm the effectiveness of theoretical predictions.
Proceedings Paper
Quantum Science & Technology
P. Ercolano, D. Salvoni, C. Bruscino, M. Di Giancamillo, C. Zhang, M. Ejrnaes, J. Huang, H. Li, L. You, L. Parlato, M. Martinelli, G. P. Pepe
Summary: A photon number resolving detector (PNRD) is a device that gives different outputs depending on the number of incident photons in the single or few photons regime. It is crucial in various applications such as quantum communication, boson sampling, and photon sources characterization. While PNRDs have been used in ultraviolet or visible wavelengths, this work focuses on the operation of an eight-pixel PNRD at the telecom wavelength of 1550 nm.
QUANTUM OPTICS AND PHOTON COUNTING 2023
(2023)
Article
Physics, Multidisciplinary
Yue Geng, Pei-Zhan Li, Jia-Qiang Zhong, Wen Zhang, Zheng Wang, Wei Miao, Yuan Ren, Sheng-Cai Shi
Summary: The study introduces a method based on a two-fluid model to extract important parameters of optical TESs, showing good qualitative agreement and suitability for further optimization of optical TESs.
Article
Optics
Hao-Qing Zhang, Ming-Zhong Ai, Jin-Ming Cui, Yong-Jian Han, Chuan-Feng Li, Guang-Can Guo
Summary: The proposal introduces a scheme to realize quantum walk with a single trapped ion for studying topological phenomenon and nonequilibrium dynamics. By tuning parameters and operators, the dynamics of the bound states can be extensively studied to determine different phases.
Article
Physics, Multidisciplinary
Zhidu Zhang, Xiaomei Zhang, Jinming Hu, Qiong Xu, Mohan Li, Cunfeng Wei, Long Wei, Zhe Wang
Summary: This study introduces a Gaussian spectrum selection method for multienergy K-edge decomposition imaging, which extracts a better K-edge signal by optimizing energy bins, improving the quality of the decomposition images, and potentially reducing the amount of contrast agents used.
FRONTIERS IN PHYSICS
(2021)
Article
Engineering, Electrical & Electronic
Daiji Fukuda
IEICE TRANSACTIONS ON ELECTRONICS
(2019)
Article
Engineering, Electrical & Electronic
Kaori Hattori, Shuichiro Inoue, Ryo Kobayashi, Kazuki Niwa, Takayuki Numata, Daiji Fukuda
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2019)
Article
Engineering, Electrical & Electronic
H. Tsuchida
ELECTRONICS LETTERS
(2019)
Article
Engineering, Electrical & Electronic
H. Tsuchida
ELECTRONICS LETTERS
(2019)
Article
Nanoscience & Nanotechnology
K. Hattori, R. Kobayashi, S. Takasu, D. Fukuda
Article
Engineering, Electrical & Electronic
H. Tsuchida
ELECTRONICS LETTERS
(2020)
Article
Optics
Yuhei Shimizu, Hiroshi Koshikawa, Masatoshi Imbe, Tetsuya Yamaki, Kuniaki Amemiya
Article
Physics, Applied
Hajime Ezawa, Hiroshi Matsuo, Masahiro Ukibe, Go Fujii, Shigetomo Shiki
JOURNAL OF LOW TEMPERATURE PHYSICS
(2020)
Article
Optics
Yuhei Shimizu, Hiroshi Koshikawa, Masatoshi Imbe, Tetsuya Yamaki, Kenji Godo, Naohiko Sasajima, Kuniaki Amemiya
Summary: Calibrating a thermal imager with an accurate flat-plate blackbody device in real time is crucial for securing reliable fever screening. Utilizing durable perfect blackbody plates with high emissivity and good heat transfer, along with a micro-cavity composite, can enhance the emissivity and thermal performance of the blackbody plates.
Article
Optics
Yuhei Shimizu, Masatoshi Imbe, Kenji Godo, Naohiko Sasajima, Hiroshi Koshikawa, Tetsuya Yamaki, Kuniaki Amemiya
Summary: The article introduces an onsite reference infrared radiator used for real-time correction of thermal imagers in noncontact fever screening to enhance reliability. A flat-plate reference radiator with the highest accuracy is developed, employing a contact-durable blackbody composite as the emissive surface, which has a microcavity structured surface offering high emissivity (>0.999). The evaluation of the developed reference radiator shows an unprecedentedly small uncertainty (0.10 degrees C) for the radiance temperature regarding spectral emissivity, in-plane uniformity, and temperature stability.
Article
Physics, Applied
Kaori Hattori, Toshio Konno, Yoshitaka Miura, Sachiko Takasu, Daiji Fukuda
Summary: This study tested an Au/Ti (10/20 nm) bilayer TES that achieved a high energy resolution by lowering the critical temperature Tc to 115 mK. The results have important implications for improving the energy resolution in biological imaging and microscopic spectroscopy.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2022)
Article
Physics, Applied
Takayuki Numata
Summary: A method for estimating the beam size of mid-infrared lasers is proposed in this study. By using a silicon-based photonic semiconductor image sensor, the distribution of thermal carriers in the laser beam can be captured and visualized, allowing for the estimation of the beam diameter. Experimental results demonstrated the effectiveness of the proposed method.
APPLIED PHYSICS EXPRESS
(2022)
Article
Engineering, Electrical & Electronic
Ryotaro Konoike, Akio Yoshizawa, Shu Namiki, Kazuhiro Ikeda
Summary: We studied a 32 x 32 silicon photonic switch that can be used as a programmable multiport interferometer, with stability suitable for both classical and quantum photonic applications. The experimental results demonstrate that our optical circuit has a wide range of potential applications in classical and quantum photonic processors based on a multiport input-output interference design.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Multidisciplinary Sciences
Kuniaki Amemiya, Yuhei Shimizu, Hiroshi Koshikawa, Hiroshi Shitomi, Tetsuya Yamaki
Summary: Emerging immersive high-dynamic range display technologies demand supreme black materials with hemispherical reflectance below 0.001 to accommodate the wide dynamic range of the human eye. We demonstrate a touchproof material with a record-low hemispherical reflectance below 0.0002 by utilizing superwavelength surface microtexture, low Mie backscattering composition, and optional additional underlayer. These supreme black finishes significantly exceed the darkness levels of previously developed touchproof super-black materials, enabling an ambient contrast ratio of greater than or similar to 10(4) in display devices and enhancing immersive visual experiences critical for remote collaboration and virtual healthcare.
