Superconducting nanowire single-photon detectors (SNSPD) are used in quantum optics when record-breaking time resolution, high speed, and exceptionally low levels of dark counts (false readings) are required. Their detection efficiency is limited, however, by the absorption coefficient of the ultrathin superconducting film for the detected radiation. One possible way of increasing the detector absorption without limiting its broadband response is to make a detector in the form of several vertically stacked layers and connect them in parallel. For the first time we have studied single-photon detection in a multilayer structure consisting of three superconducting layers of amorphous tungsten silicide (WSi) separated by thin layers of amorphous silicon. Two operating modes of the detector are illustrated: an avalanche regime and an arm-trigger regime. A shift in these modes occurs at currents of ∼0.5–0.6 times the critical current of the detector.
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March 2018
Research Article|
March 01 2018
Photon counting statistics of superconducting single-photon detectors made of a three-layer WSi film
I. N. Florya;
I. N. Florya
Moscow State Pedagogical University
, ul. Malaya Pirogovskaya 1, str. 1, Moscow 119991, Russia
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Yu. P. Korneeva;
Yu. P. Korneeva
Moscow State Pedagogical University
, ul. Malaya Pirogovskaya 1, str. 1, Moscow 119991, Russia
and Institute for Physics of Microstructures, Russian Academy of Sciences
, Nizhnyi Novgorod 603950, Russia
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M. Yu. Mikhailov;
M. Yu. Mikhailov
a)
B. I. Verkin Institute for Low-Temperature Physics and Engineering, National Academy of Sciences of Ukraine
, pr. Nauki 47, Kharkiv 61103, Ukraine
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A. Yu. Devizenko;
A. Yu. Devizenko
National Technical University “Kharkiv Polytechnical Institute,”
ul. Kirpicheva 2, Kharkiv 61002, Ukraine
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A. A. Korneev;
A. A. Korneev
a)
Moscow State Pedagogical University
, ul. Malaya Pirogovskaya 1, str. 1, Moscow 119991, Russia
and A N. Tikhonov Moscow Institute of Electronics and Mathematics, National Research University “Higher School of Economics,”
ul. Myasnitskaya 20, Moscow 101000, Russia
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G. N. Goltsman
G. N. Goltsman
Moscow State Pedagogical University
, ul. Malaya Pirogovskaya 1, str. 1, Moscow 119991, Russia
and A N. Tikhonov Moscow Institute of Electronics and Mathematics, National Research University “Higher School of Economics,”
ul. Myasnitskaya 20, Moscow 101000, Russia
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a)
Electronic addresses: [email protected] and [email protected]
Low Temp. Phys. 44, 221–225 (2018)
Article history
Received:
October 27 2017
Accepted:
April 09 2018
Citation
I. N. Florya, Yu. P. Korneeva, M. Yu. Mikhailov, A. Yu. Devizenko, A. A. Korneev, G. N. Goltsman; Photon counting statistics of superconducting single-photon detectors made of a three-layer WSi film. Low Temp. Phys. 1 March 2018; 44 (3): 221–225. https://doi.org/10.1063/1.5024539
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