Modeling InGaAs/InAlAs Spads as a Part of Single-Photon Detectors to Predict Their Electrical Parameters

Abstract

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.