Records |
Author |
Zolotov, P.; Semenov, A.; Divochiy, A.; Goltsman, G. |
Title |
A comparison of VN and NbN thin films towards optimal SNSPD efficiency |
Type |
Journal Article |
Year |
2021 |
Publication |
IEEE Trans. Appl. Supercond. |
Abbreviated Journal |
IEEE Trans. Appl. Supercond. |
Volume |
31 |
Issue |
5 |
Pages |
1-4 |
Keywords |
NbN SSPD, SNSPD, WSi |
Abstract |
Based on early phenomenological ideas about the operation of superconducting single-photon detectors (SSPD or SNSPD), it was expected that materials with a lower superconducting gap should perform better in the IR range. The plausibility of this concept could be checked using two popular SSPD materials – NbN and WSi films. However, these materials differ strongly in crystallographic structure (polycrystalline B1 versus amorphous), which makes their dependence on disorder different. In our work we present a study of the single-photon response of SSPDs made from two disordered B1 structure superconductors – vanadium nitride and niobium nitride thin films. We compare the intrinsic efficiency of devices made from films with different sheet resistance values. While both materials have a polycrystalline structure and comparable diffusion coefficient values, VN films show metallic behavior over a wide range of sheet resistance, in contrast to NbN films with an insulator-like temperature dependence of resistivity, which may be partially due to enhanced Coulomb interaction, leading to different starting points for the normal electron density of states. The results show that even though VN devices are more promising in terms of theoretical predictions, their optimal performance was not reached due to lower values of sheet resistance. |
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1051-8223 |
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1223 |
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Author |
Zolotov, P.; Vakhtomin, Yu.; Divochiy, A.; Morozov, P.; Seleznev, V.; Smirnov, K |
Title |
Development of fast and high-effective single-photon detector for spectrum range up to 2.3 μm |
Type |
Conference Article |
Year |
2017 |
Publication |
Proc. SPBOPEN |
Abbreviated Journal |
Proc. SPBOPEN |
Volume |
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Issue |
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Pages |
439-440 |
Keywords |
SSPD, SNSPD |
Abstract |
We present the results of development and testing of the single-photon-counting system operating in the wide spectrum rane up to 2.3 mcm. We managed to increase system detection efficiency up to 60% in the range of 1.7-2.3 mcm optimisation of the fabrication methods of superconducting single-photon detectors and application of the single-mode fiber with enlarged core diameter. |
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St. Petersburg, Russia |
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no |
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1255 |
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Author |
Zolotov, P.; Vakhtomin, Yu.; Divochiy, A.; Seleznev, V.; Morozov, P.; Smirnov, K. |
Title |
High-efficiency single-photon detectors based on NbN films |
Type |
Miscellaneous |
Year |
2013 |
Publication |
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Pages |
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Keywords |
SSPD, SNSPD |
Abstract |
We present our resent results in development and testing of Superconducting Single-Photon Detectors (SSPD) with detection efficiencies greater than 85%. High values of obtained results are assigned to proposed design of the detector with integrated resonator structure, including two-layer optical cavity and anti-reflective coating (ARC). |
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Poster |
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1254 |
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Author |
Елезов, М. С.; Корнеев, А. А; Дивочий, А. В.; Гольцман, Г. Н. |
Title |
Сверхпроводящие однофотонные детекторы с разрешением числа фотонов |
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Conference Article |
Year |
2009 |
Publication |
Науч. сессия МИФИ |
Abbreviated Journal |
Науч. сессия МИФИ |
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Pages |
47-58 |
Keywords |
PNR SSPD, SNSPD |
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978-5-7262-1042-1 |
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УДК 533.14(06)+004.056(06) Фотоника и информационная оптика |
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RPLAB @ sasha @ елезов2009сверхпроводящие |
Serial |
1029 |
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Author |
Елезов, М. С.; Тархов, М. А.; Дивочий, А. В.; Вахтомин, Ю. Б.; Гольцман, Г. Н. |
Title |
Система регистрации одиночных фотонов в видимом и ближнем инфракрасном диапазонах |
Type |
Conference Article |
Year |
2010 |
Publication |
Науч. сессия НИЯУ МИФИ |
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Issue |
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Pages |
94-95 |
Keywords |
SSPD |
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978-5-7262-1227-2 |
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RPLAB @ sasha @ елезов2010система |
Serial |
1032 |
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