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High-responsivity plasmonics-based GaAs metal-semiconductor-metal photodetectors

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Date

2011-09-28

Authors

Karar, Ayman
Das, Narottam
Leong Tan, Chee
Alameh, Kamal
Tak Lee, Yong
Karouta, Fouad

Journal Title

Journal ISSN

Volume Title

Publisher

American Institute of Physics (AIP)

Abstract

We report the experimental characterization of high-responsivity plasmonics-based GaAsmetal-semiconductor-metalphotodetector (MSM-PD) employing metal nano-gratings. Both the geometry and light absorption near the designed wavelength are theoretically and experimentally investigated. The measured photocurrent enhancement is 4-times in comparison with a conventional single-slit MSM-PD. We observe reduction in the responsivity as the bias voltage increases and the input light polarization varies. Our experimental results demonstrate the feasibility of developing a high-responsivity, low bias-voltage high-speed MSM-PD.

Description

Keywords

Keywords: Experimental characterization; GaAs; High-speed; Metal semiconductor metal photodetector; Nano-gratings; Photocurrent enhancement; Responsivity; Bias voltage; Gallium arsenide; Heterojunctions; Metals; Plasmons; Semiconducting gallium; Photodetectors

Citation

URI

http://hdl.handle.net/1885/16486

Collections

ANU Research Publications

Source

Applied Physics Letters

Type

Journal article

Book Title

Entity type

Access Statement

License Rights

DOI

10.1063/1.3625937

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