Numerical modeling of the temporal response of back-gated metal-semiconductor-metal photodetector in an equilibrium condition

Article

Habibpour, A., Das, N. and Mashayekhi, H. R.. 2014. "Numerical modeling of the temporal response of back-gated metal-semiconductor-metal photodetector in an equilibrium condition." Iranian Journal of Science and Technology Transaction A: Science. 38 (A4), pp. 441-444.
Article Title

Numerical modeling of the temporal response of back-gated metal-semiconductor-metal photodetector in an equilibrium condition

ERA Journal ID40388
Article CategoryArticle
AuthorsHabibpour, A. (Author), Das, N. (Author) and Mashayekhi, H. R. (Author)
Journal TitleIranian Journal of Science and Technology Transaction A: Science
Journal Citation38 (A4), pp. 441-444
Number of Pages4
Year2014
Place of PublicationIran
ISSN1028-6276
Web Address (URL)http://ijsts.shirazu.ac.ir/pdf_2560_78a43199e054cf68aafc6f8dc1f77ee6.html
Abstract

We have simulated the carrier concentration and temporal response characteristics of a Back-Gated Metal-Semiconductor-Metal (BG-MSM) photodetector in one dimension as a function of optical pulse position on the active region in an equilibrium condition (without bias voltage to the photodetector). We have adopted a nonlinear ambipolar transport model to simulate the behavior of photo-generated carriers in the active region of the BGMSM photodetector. From the simulation results, it is observed that for optical pulse positions in the cathode region, the magnitude of the response current is exactly the same but opposite that of the anode region. The response of the photodetector is zero when a pulse is positioned at the center of the active region. This important feature of the device could make it attractive for micro-scale positioning of highly sensitive instruments. Our simulation results agreed well with the experimental results.

KeywordsBG-MSM photodetector; equilibrium condition; ambipolar transport; simulation
ANZSRC Field of Research 2020400899. Electrical engineering not elsewhere classified
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Byline AffiliationsIslamic Azad University, Iran
Curtin University
University of Kerman, Iran
Institution of OriginUniversity of Southern Queensland
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