Records |
Author |
Zolotov, P. I.; Vakhtomin, Yu. B.; Divochiy, A. V.; Seleznev, V. A.; Smirnov, K. V. |
Title |
Technology development of resonator-based structures for efficiency increasing of NBN detectors of IR single photons |
Type |
Journal Article |
Year |
2016 |
Publication |
Proc. 5th Int. Conf. Photonics and Information Optics |
Abbreviated Journal |
Proc. 5th Int. Conf. Photonics and Information Optics |
Volume |
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Issue |
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Pages |
115-116 |
Keywords |
NbN SSPD |
Abstract |
This paper presents a technology of fabrication of NbN superconductive single- photon detectors, using resonator structures. The main results are related to optimization of the process of NbN sputtering over substrate with metallic mirrors and SiO 2 /Si 3 N 4 layers /4 thick. Investigation of the quantum efficiency of fabricated devices at 1.6 K on 1.55 μm showed triple-magnified value compared to standard Si/NbN structures. |
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Russian |
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978-5-7262-2215-8 |
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http://fioconf.mephi.ru/files/2015/12/FIO2016-Sbornik.pdf Разработка технологии создания резонаторных структур для увеличения квантовой эффективности NBN детекторов ИК-фотонов |
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Call Number |
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Serial |
1811 |
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Author |
Zolotov, P. I.; Semenov, A. V.; Divochiy, A. V.; Goltsman, G. N.; Romanov, N. R.; Klapwijk, T. M. |
Title |
Dependence of photon detection efficiency on normal-state sheet resistance in marginally superconducting films of NbN |
Type |
Journal Article |
Year |
2021 |
Publication |
IEEE Trans. Appl. Supercond. |
Abbreviated Journal |
IEEE Trans. Appl. Supercond. |
Volume |
31 |
Issue |
5 |
Pages |
1-5 |
Keywords |
NbN SSPD, SNSPD |
Abstract |
We present an extensive set of data on nanowire-type superconducting single-photon detectors based on niobium-nitride (NbN) to establish the empirical correlation between performance and the normal-state resistance per square. We focus, in particular, on the bias current, compared to the expected depairing current, needed to achieve a near-unity detection efficiency for photon detection. The data are discussed within the context of a model in which the photon energy triggers the movement of vortices i.e. superconducting dissipation, followed by thermal runaway. Since the model is based on the non-equilibrium theory for conventional superconductors deviations may occur, because the efficient regime is found when NbN acts as a marginal superconductor in which long-range phase coherence is frustrated. |
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1051-8223 |
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no |
Call Number |
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Serial |
1222 |
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Author |
Zolotov, P. I.; Divochiy, A. V.; Vakhtomin, Y. B.; Morozov, P. V.; Seleznev, V. A.; Smirnov, K. V. |
Title |
Development of high-effective superconducting single-photon detectors aimed for mid-IR spectrum range |
Type |
Conference Article |
Year |
2017 |
Publication |
J. Phys.: Conf. Ser. |
Abbreviated Journal |
J. Phys.: Conf. Ser. |
Volume |
917 |
Issue |
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Pages |
062037 |
Keywords |
NbN SSPD, SNSPD |
Abstract |
We report on development of superconducting single-photon detectors (SSPD) with high intrinsic quantum efficiency in the wavelength range 1.31 – 3.3 μm. By optimization of the NbN film thickness and its compound, we managed to improve detection efficiency of the detectors in the range up to 3.3 μm. Optimized devices showed intrinsic quantum efficiencies as high as 10% at mid-IR range. |
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1742-6588 |
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no |
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1233 |
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Author |
Zolotov, P. I.; Divochiy, A. V.; Vakhtomin, Y. B.; Lubenchenko, A. V.; Morozov, P. V.; Shurkaeva, I. V.; Smirnov, K. V. |
Title |
Influence of sputtering parameters on the main characteristics of ultra-thin vanadium nitride films |
Type |
Conference Article |
Year |
2018 |
Publication |
J. Phys.: Conf. Ser. |
Abbreviated Journal |
J. Phys.: Conf. Ser. |
Volume |
1124 |
Issue |
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Pages |
051030 |
Keywords |
SSPD, SNSPD, VN |
Abstract |
We researched the relation between deposition and ultra-thin VN films parameters. To conduct the experimental study we varied substrate temperature, Ar and N2 partial pressures and deposition rate. The study allowed us to obtain the films with close to the bulk values transition temperatures and implement such samples in order to fabricate superconducting single-photon detectors. |
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1742-6588 |
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no |
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Serial |
1228 |
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Author |
Zmuidzinas, J.; Betz A. L.; Boreiko R.T. |
Title |
A corner-reflector mixer mount for far infrared wavelengths |
Type |
Journal Article |
Year |
1989 |
Publication |
Infrared Phys. |
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Volume |
29 |
Issue |
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Pages |
119-131 |
Keywords |
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Abstract |
A new type of corner-reflector mixer mount, which has the advantages of ease of fabrication and assembly as well as frequency versatility, has been designed and constructed. The mixer works with arbitrary antenna lengths 241 with the reflector to antenna spacing adjusted to give a strong and symmetric central lobe. The predicted response patterns have been experimentally verified for various antenna lengths and operating frequencies between 800 and 2000 GHz. An important design feature is the incorporation of a microstrip matching network which eliminates IF impedance mismatch and provides mechanical isolation for the whisker antenna. |
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RPLAB @ atomics90 @ |
Serial |
944 |
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