MoS$_2$ Broadband Coherent Perfect Absorber for Terahertz Waves

Weiren Zhu; Fajun Xiao; Ming Kang; Debabrata Sikdar; Xianling Liang; Junping Geng; Malin Premaratne; Ronghong Jin

doi:10.1109/JPHOT.2016.2633571

IEEE Photonics Journal (Jan 2016)

MoS$_2$ Broadband Coherent Perfect Absorber for Terahertz Waves

Weiren Zhu,
Fajun Xiao,
Ming Kang,
Debabrata Sikdar,
Xianling Liang,
Junping Geng,
Malin Premaratne,
Ronghong Jin

Affiliations

Weiren Zhu: Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai, China
Fajun Xiao: Key Laboratory of Space Applied Physics and Chemistry, Ministry of Education, and Shaanxi Key Laboratory of Optical Information Technology, School of Science, Northwestern Polytechnical University, Xi’an, China
Ming Kang: College of Physics and Materials Science, Tianjin Normal University, Tianjin, China
Debabrata Sikdar: Department of Chemistry, Faculty of Natural Sciences, Imperial College London, London, U.K.
Xianling Liang: Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai, China
Junping Geng: Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai, China
Malin Premaratne: Advanced Computing and Simulation Laboratory, Department of Electrical and Computer Systems Engineering, Monash University, Clayton, Vic., Australia
Ronghong Jin: Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai, China

DOI: https://doi.org/10.1109/JPHOT.2016.2633571
Journal volume & issue: Vol. 8, no. 6
pp. 1 – 7

Abstract

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We present a comprehensive analysis of terahertz waves propagation through a bulk MoS2 crystal slab. It is shown that broadband coherent perfect absorption can be achieved and the coherent absorptivity can be adjusted from 1.57% to 99.97% by means of phase modulation. Moreover, the relative bandwidth for over 90% coherent absorptivity can be as wide as 179%. By increasing the doping rate in MoS2 crystal, the coherent absorptivity spectrum exhibits a clear blueshift whilst the peak coherent absorptivity remains over 99.9%. Full-wave numerical simulations are further carried out to confirm the validity of our theoretical analysis.

Published in IEEE Photonics Journal

ISSN: 1943-0655 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics; Science: Physics: Optics. Light
Website: http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=4563994

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