Smirnov, K., Korneev, A., Minaeva, O., Divochij, A., Rubtsova, I., Antipov, A., et al. (2006). Superconducting single-photon detector for near- and middle IR wavelength range. In Proc. 16th Int. Crimean Microwave and Telecommunication Technology (Vol. 2, pp. 684–685).
Abstract: Presented in this paper are the results of research of NbN-film superconducting single-photon detector. At 2 K temperature, quantum efficiency in the visible light (0.56 mum) reaches 30-40 %. With the wavelength increase quantum efficiency decreases and comes to 20% at 1.55 mum and 0.02% at 5.6 mum. Minimum dark counts rate is 2times10-4s-1. The jitter of detector is 35 ps. The detector was successfully implemented for integrated circuits non-invasive optical testing. It is also perspective for quantum cryptography systems
|
Loudkov, D., Tong, C. - Y. E., Marrone, D. P., Ryabchun, S., Paine, S. N., & Blundell, R. (2005). Transmission measurements of infrared filters for low-noise terahertz receiver applications. In Proc. 16th Int. Symp. Space Terahertz Technol. (pp. 354–357).
Abstract: Infrared (IR) filters are very important to the efficient operation of cryogenic receivers. Usually, such filters are mounted on the radiation shield of the cryostat to reduce the heat load to the 4 K stage. Insufficient filtering may cause the temperature of the mixing element in a receiver to be excessively warm, leading to degradation in sensitivity. These filters should be effective in blocking the room temperature IR radiation from outside the cryostat, yet should be transparent across the desired signal frequency band. In the Terahertz frequency range, which is close to the infrared, it is difficult to find an inexpensive low- loss material that can provide the required IR blocking capacity. We present transmission measurements, made using a Fourier Transform Spectrometer (FTS), of a number of potential infrared filters between 0.4 and 1.6 THz. The filters tested include the widely-used, Teflon-based, Zitex-A and Zitex-G films, alkali halide based infrared filter, and crystalline quartz coated with Parylene, and polyethylene films.
|
Ryabchun, S., Korneev, A., Matvienko, V., Smirnov, K., Kouminov, P., Seleznev, V., et al. (2004). Superconducting single photon detectors array based on hot electron phenomena. In Proc. 15th Int. Symp. Space Terahertz Technol. (pp. 242–247).
Abstract: In this paper we propose to use time domain multiplexing for large format arrays of superconducting single photon detectors (SSPDs) of the terahertz, visible and infrared frequency ranges based on ultrathin superconducting NbN films. Effective realization of time domain multiplexing for SSPD arrays is possible due to a short electric pulse of the SSPD as response to radiation quantum absorption, picosecond jitter and extremely low noise equivalent power (NEP). We present experimental results of testing 2×2 arrays in the infrared waveband. The measured noise equivalent power in the infrared and expected for the terahertz waveband is 10 – 21 WHz -1/2 . The best quantum efficiency (QE) of SSPD is 50% at 1.3 µm wavelength.
|
Tretyakov, I., Svyatodukh, S., Perepelitsa, A., Ryabchun, S., Kaurova, N., Shurakov, A., et al. (2020). Ag2S QDs/Si heterostructure-based ultrasensitive SWIR range detector. Nanomaterials (Basel), 10(5), 1–12.
Abstract: In the 20(th) century, microelectronics was revolutionized by silicon-its semiconducting properties finally made it possible to reduce the size of electronic components to a few nanometers. The ability to control the semiconducting properties of Si on the nanometer scale promises a breakthrough in the development of Si-based technologies. In this paper, we present the results of our experimental studies of the photovoltaic effect in Ag2S QD/Si heterostructures in the short-wave infrared range. At room temperature, the Ag2S/Si heterostructures offer a noise-equivalent power of 1.1 x 10(-10) W/ radicalHz. The spectral analysis of the photoresponse of the Ag2S/Si heterostructures has made it possible to identify two main mechanisms behind it: the absorption of IR radiation by defects in the crystalline structure of the Ag2S QDs or by quantum QD-induced surface states in Si. This study has demonstrated an effective and low-cost way to create a sensitive room temperature SWIR photodetector which would be compatible with the Si complementary metal oxide semiconductor technology.
|
|
Ryabchun, S., Smirnov, A., Pentin, I., Vakhtomin, Y., Smirnov, K., Kaurova, N., et al. (2011). Superconducting single photon detector integrated with optical cavity. In Proc. MLPLIT (pp. 143–145). Modern laser physics and laser-information technologies for science and manufacture.
|
