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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 | Issue | 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. | ||||
| Address | St. Petersburg, Russia | ||||
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| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1255 | |||
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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 | 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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| Series Volume | Series Issue | Edition | |||
| ISSN | 1742-6588 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1233 | |||
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| Author | Elezov, M. S.; Ozhegov, R. V.; Goltsman, G. N.; Makarov, V. | ||||
| Title | Development of the experimental setup for investigation of latching of superconducting single-photon detector caused by blinding attack on the quantum key distribution system | Type | Conference Article | ||
| Year |
2017 | Publication | EPJ Web of Conferences | Abbreviated Journal | EPJ Web of Conferences |
| Volume | 132 | Issue | 2 | Pages | 2 |
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| Abstract | Recently bright-light control of the SSPD has been demonstrated. This attack employed a “backdoor†in the detector biasing scheme. Under bright-light illumination, SSPD becomes resistive and remains “latched†in the resistive state even when the light is switched off. While the SSPD is latched, Eve can simulate SSPD single-photon response by sending strong light pulses, thus deceiving Bob. We developed the experimental setup for investigation of a dependence on latching threshold of SSPD on optical pulse length and peak power. By knowing latching threshold it is possible to understand essential requirements for development countermeasures against blinding attack on quantum key distribution system with SSPDs. |
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| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | RPLAB @ kovalyuk @ | Serial | 1116 | ||
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| Author | Elezov, M. S.; Ozhegov, R. V.; Goltsman, G. N.; Makarov, V.; Vinogradov, E. A.; Naumov, A. V.; Gladush, M. G.; Karimullin, K. R. | ||||
| Title | Development of the experimental setup for investigation of latching of superconducting single-photon detector caused by blinding attack on the quantum key distribution system | Type | Conference Article | ||
| Year |
2017 | Publication | EPJ Web Conf. | Abbreviated Journal | EPJ Web Conf. |
| Volume | 132 | Issue | Pages | 01004 (1 to 2) | |
| Keywords | QKD, SSPD, SNSPD | ||||
| Abstract | Recently bright-light control of the SSPD has been demonstrated. This attack employed a “backdoor” in the detector biasing scheme. Under bright-light illumination, SSPD becomes resistive and remains “latched” in the resistive state even when the light is switched off. While the SSPD is latched, Eve can simulate SSPD single-photon response by sending strong light pulses, thus deceiving Bob. We developed the experimental setup for investigation of a dependence on latching threshold of SSPD on optical pulse length and peak power. By knowing latching threshold it is possible to understand essential requirements for development countermeasures against blinding attack on quantum key distribution system with SSPDs. | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 2100-014X | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1327 | |||
| Permanent link to this record | |||||
| Author | Antipov, S.; Trifonov, A.; Krause, S.; Meledin, D.; Desmaris, V.; Belitsky, V.; Gol’tsman, G. | ||||
| Title | Gain bandwidth of NbN HEB mixers on GaN buffer layer operating at 2 THz local oscillator frequency | Type | Conference Article | ||
| Year |
2017 | Publication | Proc. 28th Int. Symp. Space Terahertz Technol. | Abbreviated Journal | Proc. 28th Int. Symp. Space Terahertz Technol. |
| Volume | Issue | Pages | 147-148 | ||
| Keywords | NbN HEB mixers, GaN buffer-layer, IF bandwidth | ||||
| Abstract | In this paper, we present IF bandwidth measurement results of NbN HEB mixers, which are employing NbN thin films grown on a GaN buffer-layer. The HEB mixers were operated in the heterodyne regime at a bath temperature of approximately 4.5 K and with a local oscillator operating at a frequency of 2 THz. A quantum cascade laser served as the local oscillator and a reference synthesizer based on a BWO generator (130-160 GHz) and a semiconductor superlattice (SSL) frequency multiplier was used as a signal source. By changing the LO frequency it was possible to record the IF response or gain bandwidth of the HEB with a spectrum analyzer at the operation point, which yielded lowest noise temperature. The gain bandwidth that was recorded in the heterodyne regime at 2 THz amounts to approximately 5 GHz and coincides well with a measurement that has been performed at elevated bath temperatures and lower LO frequency of 140 GHz. These findings strongly support that by using a GaN buffer-layer the phonon escape time of NbN HEBs can be significantly lower as compared to e.g. Si substrate, thus, providing higher gain bandwidth. | ||||
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| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1175 | |||
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| Author | Lobanov, Y. V.; Shcherbatenko, M. L.; Semenov, A. V.; Kovalyuk, V. V.; Korneev, A. A.; Goltsman, G. N.; Vinogradov, E. A.; Naumov, A. V.; Gladush, M. G.; Karimullin, K. R. | ||||
| Title | Heterodyne spectroscopy with superconducting single-photon detector | Type | Conference Article | ||
| Year |
2017 | Publication | EPJ Web Conf. | Abbreviated Journal | EPJ Web Conf. |
| Volume | 132 | Issue | Pages | 01005 | |
| Keywords | SSPD mixer, SNSPD | ||||
| Abstract | We demonstrate successful operation of a Superconducting Single Photon Detector (SSPD) as the core element in a heterodyne receiver. Irradiating the SSPD by both a local oscillator power and signal power simultaneously, we observed beat signal at the intermediate frequency of a few MHz. Gain bandwidth was found to coincide with the detector single pulse width, where the latter depends on the detector kinetic inductance, determined by the superconducting nanowire length. | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 2100-014X | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1205 | |||
| Permanent link to this record | |||||
| Author | Anfertev, V.; Vaks, V.; Revin, L.; Pentin, I.; Tretyakov, I.; Goltsman, G.; Vinogradov, E. A.; Naumov, A. V.; Gladush, M. G.; Karimullin, K. R. | ||||
| Title | High resolution THz gas spectrometer based on semiconductor and superconductor devices | Type | Conference Article | ||
| Year |
2017 | Publication | EPJ Web Conf. | Abbreviated Journal | EPJ Web Conf. |
| Volume | 132 | Issue | Pages | 02001 (1 to 2) | |
| Keywords | NbN HEB mixers, detectors, THz spectroscopy | ||||
| Abstract | The high resolution THz gas spectrometer consists of a synthesizer based on Gunn generator with a semiconductor superlattice frequency multiplier as a radiation source, and an NbN hot electron bolometer in a direct detection mode as a THz radiation receiver was presented. The possibility of application of a quantum cascade laser as a local oscillator for a heterodyne receiver which is based on an NbN hot electron bolometer mixer is shown. The ways for further developing of the THz spectroscopy were outlined. | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 2100-014X | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1328 | |||
| Permanent link to this record | |||||
| Author | Zubkova, E.; An, P.; Kovalyuk, V.; Korneev, A.; Ferrari, S.; Pernice, W.; Goltsman, G. | ||||
| Title | Integrated Bragg waveguides as an efficient optical notch filter on silicon nitride platform | Type | Conference Article | ||
| Year |
2017 | Publication | J. Phys.: Conf. Ser. | Abbreviated Journal | J. Phys.: Conf. Ser. |
| Volume | 917 | Issue | Pages | 062042 | |
| Keywords | Si3N4, Bragg waveguides | ||||
| Abstract | We modeled and fabricated integrated optical Bragg waveguides on a silicon nitride (Si3N4) platform. These waveguides would serve as efficient notch-filters with the desired characteristics. Transmission spectra of the fabricated integrated notch filters have been measured and attenuation at the desired wavelength of 1550 nm down to -43 dB was observed. Performance of the filters has been studied depending on different parameters, such as pitch, filling factor, and height of teeth of the Bragg grating | ||||
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| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | RPLAB @ kovalyuk @ | Serial | 1141 | ||
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| Author | Zubkova, E.; An, P.; Kovalyuk, V.; Korneev, A.; Goltsman, G. | ||||
| Title | Integrated Bragg waveguides as an efficient optical notch filter on silicon nitride platform | Type | Conference Article | ||
| Year |
2017 | Publication | Proc. SPBOPEN | Abbreviated Journal | Proc. SPBOPEN |
| Volume | Issue | Pages | 449-450 | ||
| Keywords | Bragg waveguides | ||||
| Abstract | We modeled and fabricated integrated optical Bragg waveguides on a silicon nitride (Si3N4) platform. Transmission spectra of the integrated notch filter has been measured and attenuation at the desired wavelength of 1550 nm down to -43 dB was observed. | ||||
| Address | St. Petersburg, Russia | ||||
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| Area | Expedition | Conference | |||
| Notes | Duplicated as 1141 | Approved | no | ||
| Call Number | Serial | 1257 | |||
| Permanent link to this record | |||||
| Author | Chuprina, I. N.; An, P. P.; Zubkova, E. G.; Kovalyuk, V. V.; Kalachev, A. A.; Gol'tsman, G. N. | ||||
| Title | Optimisation of spontaneous four-wave mixing in a ring microcavity | Type | Conference Article | ||
| Year |
2017 | Publication | J. Phys.: Conf. Ser. | Abbreviated Journal | J. Phys.: Conf. Ser. |
| Volume | 47 | Issue | 10 | Pages | 887-891 |
| Keywords | ring microcavity | ||||
| Abstract | Abstract. A theory of spontaneous four-wave mixing in a ring microcavity is developed. The rate of emission of biphotons for pulsed and monochromatic pumping with allowance for the disper- sion of group velocities is analytically calculated. In the first case, pulses in the form of an increasing exponential are considered, which are optimal for excitation of an individual resonator mode. The behaviour of the group velocity dispersion as a function of the width and height of the waveguide is studied for a specific case of a ring microcavity made of silicon nitride. The results of the numeri- cal calculation are in good agreement with the experimental data. The ring microcavity is made of two types of waveguides: com- pletely etched and half etched. It is found that the latter allow for better control over the parameters in the manufacturing process, making them more predictable. | ||||
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| Notes | Approved | no | |||
| Call Number | RPLAB @ kovalyuk @ | Serial | 1142 | ||
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