摘要
We demonstrate an ultralow-noise single-photon detection system based on a sensitive photomultiplier tube（PMT） with precise temperature control, which can capture fast single photons with intervals around 10 ns.By improvement of the electromagnetic shielding and introduction of the self-differencing method, the dark counts（DCs） are cut down to ~1%. We further develop an ultra-stable PMT cooling subsystem and observe that the DC goes down by a factor of 3.9 each time the temperature drops 10°C. At -20°C it is reduced 400 times with respect to the room temperature（25°C）, that is, it becomes only 2 counts per second, which is on par with the superconducting nanowire detectors. Meanwhile, despite a 50% loss, the detection efficiency is still 13%. Our detector is available for ultra-precise single-photon detection in environments with strong electromagnetic disturbances.
We demonstrate an ultralow-noise single-photon detection system based on a sensitive photomultiplier tube（PMT） with precise temperature control, which can capture fast single photons with intervals around 10 ns.By improvement of the electromagnetic shielding and introduction of the self-differencing method, the dark counts（DCs） are cut down to ~1%. We further develop an ultra-stable PMT cooling subsystem and observe that the DC goes down by a factor of 3.9 each time the temperature drops 10°C. At -20°C it is reduced 400 times with respect to the room temperature（25°C）, that is, it becomes only 2 counts per second, which is on par with the superconducting nanowire detectors. Meanwhile, despite a 50% loss, the detection efficiency is still 13%. Our detector is available for ultra-precise single-photon detection in environments with strong electromagnetic disturbances.
作者
王明宇
李政勇
蔡艳辉
张伊
詹翔空
王海洋
吴重庆
Mingyu Wang;Zhengyong Li;Yanhui Cai;Yi Zhang;Xiangkong Zhan;Haiyang Wang;Chongqing Wu(Key Lab of Education Ministry on Luminescence and Optical Information Technology, Beijing Jiaotong University, Beijing 100044, China;The Institute of Optics, University of Rochester, 275 Hutchison Road, Rochester, New York 14627, USA)
基金
supported by the National Natural Science Foundation of China(Nos.11574026 and 11274037)
the Program for New Century Excellent Talents in University,MOE of China(No.NCET-12-0765)
the Foundation for the Author of National Excellent Doctoral Dissertation,China(No.201236)
