Abstract
In this paper, a theoretical procedure for evaluation of the performance of quantum ring intersubband photodetectors is demonstrated. In this analytical model it is assumed that thermionic emission and field-assisted tunneling are two main mechanisms which determine the dark current of QRIPs. Moreover, a new formula for calculating average number of electrons in a QRIP is presented. The model allows calculating the other parameters of QRIP such as photocurrent, responsivity and detectivity as a function of quantum ring density and voltages at various temperatures. Simulation results show a higher responsivity and detectivity about 3.2 A/W and \(10^{10}\,\hbox {cm}\,\hbox {Hz}^{1/2}/\hbox {W}\) at T = 78 K.
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