?
Modeling InGaAs/InAlAs Spads as a Part of Single-Photon Detectors to Predict Their Electrical Parameters
Journal of Russian Laser Research. 2023. Vol. 44. P. 156–162.
We construct a model of InGaAs/InAlAs single-photon avalanche diodes in the T-CAD computing environment, in order to predict their electrical parameters, when they work as a part of single-photon detectors. The obtained results are applicable for optimizing the design of single-photon avalanche photodiodes for the use as sensitive elements in light detection devices. The main advantage of the developed model of InGaAs/InAlAs single-photon diodes is the fact that it can be integrated in the electrical control circuit of the single-photon detector to simulate the operation of the diode, which allows not only setting up the detector control system but also testing new circuit solutions.
Alexandr Filyaev, Losev A., Vladimir Zavodilenko et al., Journal of Optical Technology (A Translation of Opticheskii Zhurnal) 2024 Vol. 90 No. 12 P. 737–742
Subject of study. A noise parameter, such as an afterpulse effect, that occurs in indium-gallium arsenide/indium phosphide single-photon avalanche diodes when operated as part of a single-photon detector in quantum key distribution systems was investigated. The aim of this study was the analysis of indium-gallium arsenide/indium phosphide single-photon avalanche diode afterpulse effect estimation approaches for real-world quantum key ...
Added: May 6, 2026
Zavodilenko V. V., Losev A. V., Filyaev A. A. et al., Optoelectronics, Instrumentation and Data Processing 2023 Vol. 59 P. 148–155
Automated measuring stand (AMS) for evaluation of the operational parameters of single-photon detectors (SPD) has been developed together with the software that implements the method of evaluating SPD efficiency parameters from the experimental data measured with AMS. We present graphical interface of the software, which allows generating recommendations for configuring operation mode of the detector ...
Added: September 1, 2023
Losev A., Zavodilenko V. V., Koziy A. et al., IEEE Journal of Quantum Electronics 2022 Vol. 58 No. 3 P. 1–11
We have performed a detailed study of the dependence of afterpulse probability in InGaAs/InP sine-gated SPAD on the dead time and the existing approach for its implementation. We demonstrated an electrical scheme combining sinusoidal gating and active reset. We have shown when such solutions are beneficial from the key distribution point of view, and enough ...
Added: May 12, 2023
Seleznev V., Divochiy A., Vakhtomin Y. et al., Journal of Physics: Conference Series 2016 Vol. 737 No. 012032 P. 1–9
We have developed the deposition technology of WSi thin films 4 to 9 nm thick with high temperature values of superconducting transition (Tc~4 K). Based on deposed films there were produced nanostructures with indicative planar sizes ~100 nm, and the research revealed that even on nanoscale the films possess of high critical temperature values of ...
Added: November 24, 2017
Vetter A., Ferrari S., Rath P. et al., Nano Letters 2016 Vol. 16 No. 11 P. 7085–7092
Ultrafast single-photon detectors with high efficiency are of utmost importance for many applications in the context of integrated quantum photonic circuits. Detectors based on superconductor nanowires attached to optical waveguides are particularly appealing for this purpose. However, their speed is limited because the required high absorption efficiency necessitates long nanowires deposited on top of the ...
Added: February 2, 2017
Rath P., Vetter A., Kovalyuk V. et al., , in: Proceedings of SPIE - The International Society for Optical Engineering. San Francisco, California, United States | February 13, 2016Т. 9750: Integrated Optics: Devices, Materials, and Technologies XX.: Беллингхем: Society of Photo-Optical Instrumentation Engineers, 2016. P. 97500T-1– 97500T-8.
We report on the design, fabrication and measurement of travelling-wave superconducting nanowire single-photon detectors (SNSPDs) integrated with polycrystalline diamond photonic circuits. We analyze their performance both in the near-infrared wavelength regime around 1600 nm and at 765 nm. Near-IR detection is important for compatibility with the telecommunication infrastructure, while operation in the visible wavelength range ...
Added: October 29, 2016
Khasminskaya S., Pyatkov F., Stowik K. et al., Nature Photonics 2016 Vol. 10 P. 727–733
Photonic quantum technologies allow quantum phenomena to be exploited in applications such as quantum cryptography, quantum simulation and quantum computation. A key requirement for practical devices is the scalable integration of single-photon sources, detectors and linear optical elements on a common platform. Nanophotonic circuits enable the realization of complex linear optical systems, while non-classical light ...
Added: October 20, 2016
Lusche R., Semenov A., Ilin K. et al., Journal of Applied Physics 2014 Vol. 116 No. 4 P. 043906-1–043906-9
A thorough spectral study of the intrinsic single-photon detection efficiency in superconducting TaN and NbN nanowires with different widths has been performed. The experiment shows that the cut-off of the intrinsic detection efficiency at near-infrared wavelengths is most likely controlled by the local suppression of the barrier for vortex nucleation around the absorption site. Beyond ...
Added: February 24, 2016
Vodolazov D. Y., Korneeva Y. P., Semenov A. V. et al., Physical Review B: Condensed Matter and Materials Physics 2015 Vol. 92 No. 10 P. 104503-1–104503-9
We use an external magnetic field to probe the detection mechanism of a superconducting nanowire single-photon detector. We argue that the hot belt model (which assumes partial suppression of the superconducting order parameter Delta across the whole width of the superconducting nanowire after absorption of the photon) does not explain observed weak-field dependence of the ...
Added: October 10, 2015
Murphy A., Semenov A., Korneev A. et al., Scientific Reports 2015 Vol. 5 P. 10174
We perform measurements of the switching current distributions of three w nm wide, 4 nm thick NbN superconducting strips which are used for single-photon detectors. These strips are much wider than the diameter of the vortex cores, so they are classified as quasi-two-dimensional (quasi-2D). We discover evidence of macroscopic quantum tunneling by observing the saturation ...
Added: September 3, 2015