Records |
Author |
Dryazgov, M.; Semenov, A.; Manova, N.; Korneeva, Y.; Korneev, A. |
Title |
Modelling of normal domain evolution after single-photon absorption of a superconducting strip of micron width |
Type |
Conference Article |
Year |
2020 |
Publication |
J. Phys.: Conf. Ser. |
Abbreviated Journal |
J. Phys.: Conf. Ser. |
Volume |
1695 |
Issue |
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Pages |
012195 (1 to 4) |
Keywords |
SSPD modelling, SNSPD |
Abstract |
The present paper describes a modelling of normal domain evolution in superconducting strip of micron width using solving differential equations describing the temperature and current changes. The solving results are compared with experimental data. This comparison demonstrates the high accuracy of the model. In future, it is possible to employ this model for improvement of single photon detector based on micron-scale superconducting strips. |
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1742-6588 |
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Serial |
1785 |
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Author |
Manova, N. N.; Simonov, N. O.; Korneeva, Y. P.; Korneev, A. A. |
Title |
Developing of NbN films for superconducting microstrip single-photon detector |
Type |
Conference Article |
Year |
2020 |
Publication |
J. Phys.: Conf. Ser. |
Abbreviated Journal |
J. Phys.: Conf. Ser. |
Volume |
1695 |
Issue |
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Pages |
012116 (1 to 5) |
Keywords |
NbN SSPD, SNSPD, NbN films |
Abstract |
We optimized NbN films on a Si substrate with a buffer SiO2 layer to produce superconducting microstrip single-photon detectors with saturated dependence of quantum efficiency (QE) versus normalized bias current. We varied thickness of films and observed the maximum QE saturation for device based on the thinner film with the lowest ratio RS300/RS20. |
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1742-6588 |
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1786 |
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Author |
Polyakova, M. I.; Korneev, A. A.; Semenov, A. V. |
Title |
Comparison single- and double- spot detection efficiencies of SSPD based to MoSi and NbN films |
Type |
Conference Article |
Year |
2020 |
Publication |
J. Phys.: Conf. Ser. |
Abbreviated Journal |
J. Phys.: Conf. Ser. |
Volume |
1695 |
Issue |
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Pages |
012146 (1 to 3) |
Keywords |
NbN SSPD, SNSPD, MoSi |
Abstract |
In this work, we present results of quantum detector tomography of superconducting single photon detector (SSPD) based on MoSi film, and compare them with previously reported data on NbN. We find that for both materials hot spot interaction length coincides with the strip width, and the dependence of single and double-spot detection efficiencies on bias current are compatible with sufficiently large hot-spot size, approaching the strip width. |
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1742-6588 |
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1787 |
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Author |
Elmanov, Ilia; Elmanova, Anna; Kovalyuk, Vadim; An, Pavel; Goltsman, Gregory |
Title |
Integrated contra-directional coupler for NV-centers photon filtering |
Type |
Conference Article |
Year |
2020 |
Publication |
Proc. 32-nd EMSS |
Abbreviated Journal |
Proc. 32-nd EMSS |
Volume |
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Issue |
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Pages |
354-360 |
Keywords |
NV-centers, nanodiamonds, quantum photonic integrated circuits, contra-direction coupler, Bragg gratings |
Abstract |
We modelled an integrated optical contra-directional coupler on silicon nitride platform. Performance of the filter was studied depending on different parameters, including the grating period and the height of teeth of the Bragg grating near 637 nm operation wavelength. The obtained results can be used for a design and fabrication of quantum photonic integrated circuits with on-chip single-photon NV-centers in nanodiamonds. |
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ISSN |
2724-0029 |
ISBN |
978-88-85741-44-7 |
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Conference |
32nd European Modeling & Simulation Symposium |
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no |
Call Number |
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Serial |
1839 |
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Author |
Elmanov, Ilia; Elmanova, Anna; Kovalyuk, Vadim; An, Pavel; Goltsman, Gregory |
Title |
Silicon nitride photonic crystal cavity coupled with NV-centers in nanodiamonds |
Type |
Conference Article |
Year |
2020 |
Publication |
Proc. 32-nd EMSS |
Abbreviated Journal |
Proc. 32-nd EMSS |
Volume |
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Issue |
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Pages |
344-348 |
Keywords |
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Abstract |
The development of integrated quantum photonics requires a high efficient excitation and coupling of a single photon source with on-chip devices. In this paper, we show our results of modelling for high-Q photonic crystal cavity, optimized for zero phonon line emission of NV-centers in nanodiamonds. Modelling was performed for the silicon nitride platform and obtained a quality factor equals to 6136 at 637 nm wavelength. |
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NV-centers, nanodiamonds |
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ISSN |
2724-0029 |
ISBN |
978-88-85741-44-7 |
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32nd European Modeling & Simulation Symposium |
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Call Number |
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Serial |
1840 |
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