A High-Efficiency Broadband Superconducting Nanowire Single-Photon Detector with a Composite Optical Structure
Superconducting nanowire single-photon detectors （SNSPDs） with a composite optical structure composed of phase-grating and optical cavity structures are designed to enhance both the system detection efficiency and the response bandwidth. Numerical simulation by the finite-difference time-domain meth...
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| Published in | Chinese physics letters Vol. 32; no. 3; pp. 145 - 148 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
01.03.2015
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| Subjects | |
| Online Access | Get full text |
| ISSN | 0256-307X 1741-3540 |
| DOI | 10.1088/0256-307X/32/3/038501 |
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| Abstract | Superconducting nanowire single-photon detectors （SNSPDs） with a composite optical structure composed of phase-grating and optical cavity structures are designed to enhance both the system detection efficiency and the response bandwidth. Numerical simulation by the finite-difference time-domain method shows that the photon absorption capacity of SNSPDs with a composite optical structure can be enhanced significantly by adjusting the parameters of the phase-grating and optical cavity structures at multiple frequency bands. The absorption capacity of the superconducting nanowires reaches 70%, 72%, 60.73%, 61.7%, 41.2%, and 46.5% at wavelengths of 684, 850, 732, 924, 1256, and 1426nm, respectively. The use of a composite optical structure reduces the total filling factor of superconducting nanowires to only 0.25, decreases the kinetic inductance of SNSPDs, and improves the count rates. |
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| AbstractList | Superconducting nanowire single-photon detectors （SNSPDs） with a composite optical structure composed of phase-grating and optical cavity structures are designed to enhance both the system detection efficiency and the response bandwidth. Numerical simulation by the finite-difference time-domain method shows that the photon absorption capacity of SNSPDs with a composite optical structure can be enhanced significantly by adjusting the parameters of the phase-grating and optical cavity structures at multiple frequency bands. The absorption capacity of the superconducting nanowires reaches 70%, 72%, 60.73%, 61.7%, 41.2%, and 46.5% at wavelengths of 684, 850, 732, 924, 1256, and 1426nm, respectively. The use of a composite optical structure reduces the total filling factor of superconducting nanowires to only 0.25, decreases the kinetic inductance of SNSPDs, and improves the count rates. Superconducting nanowire single-photon detectors (SNSPDs) with a composite optical structure composed of phase-grating and optical cavity structures are designed to enhance both the system detection efficiency and the response bandwidth. Numerical simulation by the finite-difference time-domain method shows that the photon absorption capacity of SNSPDs with a composite optical structure can be enhanced significantly by adjusting the parameters of the phase-grating and optical cavity structures at multiple frequency bands. The absorption capacity of the superconducting nanowires reaches 70%, 72%, 60.73%, 61.7%, 41.2%, and 46.5% at wavelengths of 684, 850, 732, 924, 1256, and 1426 nm, respectively. The use of a composite optical structure reduces the total filling factor of superconducting nanowires to only 0.25, decreases the kinetic inductance of SNSPDs, and improves the count rates. |
| Author | 顾敏 康琳 张蜡宝 赵清源 郏涛 万超 徐睿莹 杨小忠 吴培亨 |
| AuthorAffiliation | Research Institute of Superconductor Electronics, School of Electronic Science and Engineering, Nanjing University, Nanjing 210093 |
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| Cites_doi | 10.1364/OE.21.010208 10.1364/OE.21.027177 10.1080/14786448108626995 10.1063/1.3600793 10.1021/nl2005143 10.1364/AO.48.006252 10.1063/1.2405870 10.1103/PhysRevA.87.010301 10.1364/OE.16.003191 10.1364/OPEX.14.000527 10.1587/transele.E94.C.260 10.1051/epjap/2009087 10.1063/1.1388868 10.1088/0953-2048/25/6/063001 10.1007/s00340-009-3558-0 10.1063/1.2183810 |
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| Notes | 11-1959/O4 GU Min, KANG Lin, ZHANG La-Bao, ZHAO Qing-Yuan, JIA Tao, WAN Chao, XU Rui-Ying, YANG Xiao-Zhong, WU Pei-Heng（Research Institute of Superconductor Electronics, School of Electronic Science and Engineering, Nanjing University, Nanjing 210093） Superconducting nanowire single-photon detectors （SNSPDs） with a composite optical structure composed of phase-grating and optical cavity structures are designed to enhance both the system detection efficiency and the response bandwidth. Numerical simulation by the finite-difference time-domain method shows that the photon absorption capacity of SNSPDs with a composite optical structure can be enhanced significantly by adjusting the parameters of the phase-grating and optical cavity structures at multiple frequency bands. The absorption capacity of the superconducting nanowires reaches 70%, 72%, 60.73%, 61.7%, 41.2%, and 46.5% at wavelengths of 684, 850, 732, 924, 1256, and 1426nm, respectively. The use of a composite optical structure reduces the total filling factor of superconducting nanowires to only 0.25, decreases the kinetic inductance of SNSPDs, and improves the count rates. ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
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| References | 11 12 Zhou Y (10) 2012; 61 13 14 16 17 18 Natarajan C M (4) 2012; 25 19 Zhang L B (9) 2011; 6 1 Lin S Z (15) 2013; 25 2 3 5 6 7 8 |
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| SubjectTerms | Broadband Computer simulation Detectors Finite difference method Holes Mathematical models Nanowires Superconductivity 光学结构 单光子探测器 器具 复合 宽带 时域有限差分 纳米线 超导 |
| Title | A High-Efficiency Broadband Superconducting Nanowire Single-Photon Detector with a Composite Optical Structure |
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