Responsivity and detectivity enhancements by graphene overlay on normal-incident multicolor quantum grid infrared photodetectors

Bor Wei Liang; Chiu Chang Huang; Song Po Chao; Kuang Ju Kao; Kristan Bryan Simbulan; Yann Wen Lan; Chieh Hsiung Kuan

doi:10.1364/OE.384379

Responsivity and detectivity enhancements by graphene overlay on normal-incident multicolor quantum grid infrared photodetectors

Bor Wei Liang, Chiu Chang Huang, Song Po Chao, Kuang Ju Kao, Kristan Bryan Simbulan, Yann Wen Lan, Chieh Hsiung Kuan

Department of Physics

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

An efficient and effective method to achieve high responsivity and specific detectivity, particularly for normal-incident quantum well infrared photodetectors (QWIPs), is proposed in this study. By combining superlattice (SL) structure, grating structures, and graphene monolayer onto traditional QWIP designs, a graphene-covered multicolor quantum grid infrared photodetector (QGIP) with improved optoelectrical properties is developed. The enhancements of the device’s responsivity and specific detectivity are about 7-fold and 20-fold, respectively, which resulted from an increase in the charge depletion region and the generation of extra photoelectrons due to graphene-semiconductor heterojunction. This method provides a potential candidate for future high-performance photodetectors.

Original language	English
Pages (from-to)	2456-2465
Number of pages	10
Journal	Optics Express
Volume	28
Issue number	2
DOIs	https://doi.org/10.1364/OE.384379
Publication status	Published - 2020 Jan 20

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1364/OE.384379

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abstract = "An efficient and effective method to achieve high responsivity and specific detectivity, particularly for normal-incident quantum well infrared photodetectors (QWIPs), is proposed in this study. By combining superlattice (SL) structure, grating structures, and graphene monolayer onto traditional QWIP designs, a graphene-covered multicolor quantum grid infrared photodetector (QGIP) with improved optoelectrical properties is developed. The enhancements of the device{\textquoteright}s responsivity and specific detectivity are about 7-fold and 20-fold, respectively, which resulted from an increase in the charge depletion region and the generation of extra photoelectrons due to graphene-semiconductor heterojunction. This method provides a potential candidate for future high-performance photodetectors.",

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AU - Simbulan, Kristan Bryan

AU - Lan, Yann Wen

AU - Kuan, Chieh Hsiung

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Responsivity and detectivity enhancements by graphene overlay on normal-incident multicolor quantum grid infrared photodetectors

Abstract

ASJC Scopus subject areas

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