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Analytical Modeling and Numerical Simulation of Hg1-xCdxTe Based N+n0p+ Photodetector for MWIR Free Space Optical Communication

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Title: Analytical Modeling and Numerical Simulation of Hg1-xCdxTe Based N+n0p+ Photodetector for MWIR Free Space Optical Communication

Authors: A.D.D. Dwivedi, P. Chakrabarti

Journal: International journal of advanced applied physics research

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Publisher: Cosmos Scholars Publishing House

Year: 2015

Volume: 2

Issue: 2

Language: en

DOI: 10.15379/2408-977X.2015.02.02.4

Keywords: Numerical simulationquantum efficiencyspectral responseMedium wave length infrared region (MWIR)PhotodetectorResponsivity and Detectivity

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

Abstract

This paper reports an analytical modeling and numerical simulation of N+-Hg0.59 Cd0.41Te /n0 Hg0.65 Cd0.35Te /p+-Hg0.65 Cd0.35 N+n0p+ photodetector for operation in medium wavelength infrared region (MWIR) for free space optical communication. The photodetector has been studied in respect of quantum efficiency, responsivity and detectivity by analytical method using closed form equations. Also numerical simulation has been performed using device simulation software ATLASTM for obtaining the energy band diagram, electric field profile, doping profile, quantum efficiency, responsivity and detectivity. The photodetector exhibits a high value of quantum efficiency~93%, responsivity~2.86A/W and detectivity~1.33×1011 mHz1/2W-1 at wavelength of operation 3.8 µm

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