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Transient response analysis of quantum well infrared photodetector

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Abstract

In this paper, a simple transport model is developed using the rate and continuity equation for the analysis of transient response of a multiple quantum well infrared photodetector. The effect of carrier capture and the doping dependent optical absorption are incorporated in the model for accurate estimation of responsivity in the frequency domain. In case of high capture time, 3 dB bandwidth swings 5 GHz for M = 10 by changing doping from 1.2 × 1017 cm−3 to 1 × 1018 cm−3 whereas it swings only 0.9 GHz for M = 52. Moreover, barrier width and QW periods on the transient responsivity and bandwidth of the detector has been examined and the results have been found out to be of great significance. However, responsivity variation with QW periods bears very less significance for LB > 48 nm. The role of capture time (1 ps–11 ps) on the 3 dB bandwidth has also been studied and the result shows a significant drop from 95 to 76 GHz for M = 20.

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Authors and Affiliations

  1. Department of Electronics and Communication Engineering, Asansol Engineering Collge, Asansol, India

    Md Aref Billaha

  2. Department of Electronics Engineering, Indian Institute of Technology (ISM), Dhanbad, India

    Mukul K. Das

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  1. Md Aref Billaha
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  2. Mukul K. Das
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Billaha, M.A., Das, M.K. Transient response analysis of quantum well infrared photodetector. Opt Quant Electron 53, 451 (2021). https://doi.org/10.1007/s11082-021-03113-5

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