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Numerical Simulation of HgCdTe Based Simultaneous MWIR/LWIR Photodetector for Free Space Optical Communication

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Title: Numerical Simulation of HgCdTe Based Simultaneous MWIR/LWIR Photodetector for Free Space Optical Communication

Authors: A.D.D. Dwivedi, A. Pranav, Gaurav Gupta, P. Chakrabarti

Journal: International journal of advanced applied physics research

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Publisher: Cosmos Scholars Publishing House

Year: 2015

Volume: 2

Issue: 1

Language: en

DOI: 10.15379/2408-977X.2015.02.01.5

Keywords: Numerical simulationquantum efficiencyPhotodetectorspectral response.

Categories
Semiconductor Physics (63) Electrical Engineering (5972) Optics (304) Physics (3755) Materials Science (8025)

Abstract

In this paper we report a theoretically simulated multilayer Hg1-xCdxTe based heterojunction photodetector for dual band operation at temperature 78K. The detector is designed to operate at two strategic atmospheric windows in the MIR (3.8 µm) and in the LWIR (10.6 µm) region. The device has been modeled using closed form analytical formula and is also simulated using the device simulation software ATLAS from SILVACO® international. The device has been theoretically characterized in respect of energy band diagram, electric field profile, current voltage characteristics, spectral response and quantum efficiency. The detector is expected to find application in free space optical communication at 3.8 µm and at 10.6 µm

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