Open AccessPolarization-insensitive and wide-angle broadband absorption enhancement of molybdenum disulfide in visible regime
Author(s) -
Xin Luo,
Zhimin Liu,
Ziqiang Cheng,
Jianping Liu,
Qi Lin,
Lingling Wang
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.033918
Subject(s) - molybdenum disulfide , materials science , monolayer , optics , finite difference time domain method , polarization (electrochemistry) , brewster's angle , absorption (acoustics) , metamaterial , wavelength , optoelectronics , broadband , molybdenum , visible spectrum , nanotechnology , chemistry , physics , brewster , metallurgy , composite material
In order to remarkably enhance the absorption capability of monolayer molybdenum disulfide (MoS2), a broadband MoS2-based perfect absorber, which is inspired by metamaterial, is proposed. By using the finite-difference time-domain (FDTD) simulations, the absorption of proposed MoS2-based absorber above 94% is achieved from 594 to 809 nm. Meanwhile, the average absorptions of monolayer MoS2 enhanced up to 27% and 67% are realized from 598 to 671 nm and 710 to 801 nm, respectively. By manipulating related structural parameters, the absorption spectrum can be further broadened and shifted in a wide wavelength range. Furthermore, the proposed absorber can tolerate a relatively wide range of incident angles and demonstrate polarization-independence.