Moshkova, M., Morozov, P., Divochiy, A., Vakhtomin, Y., & Smirnov, K. (2019). Large active area superconducting single photon detector. In J. Phys.: Conf. Ser. (Vol. 1410, 012139).
Abstract: We present development of large active area superconducting single-photon detectors well coupled with standard 50 μm-core multi-mode fiber. The sensitive area of the SSPD is patterned using the photon-number-resolving design and occupies an area of 40×40 μm2. Using this approach, we have obtained excellent specifications: system detection efficiency of 47% measured using a 900 nm laser and low dark count rate of 100 cps. The main advantages of the approach presented are a very short dead time of the detector of 22 ns and FWHM jitter value of about 130 ps.
|
Manova, N. N., Smirnov, E. O., Korneeva, Y. P., Korneev, A. A., & Goltsman, G. N. (2019). Superconducting photon counter for nanophotonics applications. In J. Phys.: Conf. Ser. (Vol. 1410, 012147 (1 to 5)).
Abstract: We develop large area superconducting single-photon detector SSPD with a micron-wide strip suitable for free-space coupling or packaging with multi-mode optical fibres. The detector sensitive area is 20 μm in diameter. In near infrared (1330 nm wavelength) our SSPD exhibits above 30% detection efficiency with low dark counts and 45 ps timing jitter.
|
Polyakova, M. I., Florya, I. N., Semenov, A. V., Korneev, A. A., & Goltsman, G. N. (2019). Extracting hot-spot correlation length from SNSPD tomography data. In J. Phys.: Conf. Ser. (Vol. 1410, 012166 (1 to 4)).
Abstract: We present data of quantum detector tomography for the samples specifically optimized for this problem. Using this method, we take results of hot-spot correlation length of 17 ± 2 nm.
|
Smirnov, E., Golikov, A., Zolotov, P., Kovalyuk, V., Lobino, M., Voronov, B., et al. (2018). Superconducting nanowire single-photon detector on lithium niobate. In J. Phys.: Conf. Ser. (Vol. 1124, 051025).
Abstract: We demonstrate superconducting niobium nitride nanowires folded on top of lithium niobate substrate. We report of 6% system detection efficiency at 20 s−1 dark count rate at telecommunication wavelength (1550 nm). Our results shown great potential for the use of NbN nanowires in the field of linear and nonlinear integrated quantum photonics.
|
Zolotov, P. I., Divochiy, A. V., Vakhtomin, Y. B., Lubenchenko, A. V., Morozov, P. V., Shurkaeva, I. V., et al. (2018). Influence of sputtering parameters on the main characteristics of ultra-thin vanadium nitride films. In J. Phys.: Conf. Ser. (Vol. 1124, 051030).
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.
|
