Ultra-wide Spectral Bandwidth and Enhanced Absorption in a Metallic Compound Grating Covered by Graphene Monolayer

Nguyen-Huu, Nghia, Pistora, Jaromir, Cada, Michael, Nguyen-Thoi, Trung, Ma, Youqiao, Yasumoto, Kiyotoshi, Rahman, B. M. A., Wu, Qiang, Ma, Yuan, Ngo, Quang Hieu, Jie, Lin and Maeda, Hiroshi (2021) Ultra-wide Spectral Bandwidth and Enhanced Absorption in a Metallic Compound Grating Covered by Graphene Monolayer. IEEE Journal of Selected Topics in Quantum Electronics, 27 (1). p. 8500108. ISSN 1077-260X

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Official URL: https://doi.org/10.1109/jstqe.2020.2984559


Graphene, a two-dimensional monatomic layer of carbon material, has demonstrated as a good candidate for applications of ultrafast photodetectors, transistors, transparent electrodes, and biosensors. Recently, many studies have shown that using metallic deep gratings could enhance the absorptance of graphene of 2.3% up to 80% in the near infrared region for applications in photon detection. This paper presents utilizing a nanograting structure, namely, a compound metallic grating could greatly enhance the absorptance of graphene up to 98% and widen its spectral bandwidth to 0.6 μm, which are greater than those of previous work. The study also showed that the absorptance spectrum is insensitive to angles of incidence. Furthermore, the proposed graphene-covered compound grating might bring a lot of benefits for graphene designs-based optical and optoelectronic devices.

Item Type: Article
Uncontrolled Keywords: Graphene, numerical analysis, optoelectronic devices, photodetectors, subwavelength gratings
Subjects: G400 Computer Science
H600 Electronic and Electrical Engineering
Department: Faculties > Engineering and Environment > Computer and Information Sciences
Depositing User: Elena Carlaw
Date Deposited: 07 Apr 2020 09:41
Last Modified: 31 Jul 2021 11:47
URI: http://nrl.northumbria.ac.uk/id/eprint/42714

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