Broadband absorption of monolayer MoS₂ in visible region using a tetramerized nanorod metasurface

Abstract

High-efficient broadband absorption of the monolayer MoS2 is achieved by using a tetramerized nanorod metasurface (TNM), and the average absorption of 64.5% for the monolayer MoS2 can be obtained in the visible range of 400-750 nm. The unit cell of the TNM consists four Ag nanorods with different diameters, the incident light can be selectively absorbed by the monolayer MoS2 due to the magnetic resonance associated with the individual Ag nanorod, and broadband absorption of the monolayer MoS2 is realizable due to the cooperative magnetic resonances related to the tetramerized Ag nanorods. In addition, the absorption of the monolayer MoS2 is robust to the variation of the structural parameters, and it exhibits wide-angle and polarization-independent features.

Metamaterial ultra-wideband solar absorbers based on a multi-layer structure with cross etching

“…In recent years, more and more researchers have focused on achieving broadband absorption. [5][6][7][8] In 2012, Cui et al 9 designed an absorber that achieved more than 95% absorption in the infrared band. In 2013, Liang et al 10 designed a metamaterial absorber with a two-dimensional pyramid structure that achieved near-perfect absorption in the band of 1000-1400 nm.…”

Resonant perfect absorption of molybdenum disulfide beyond the bandgap

“…[28] An average absorption of 64.5% for monolayer MoS 2 was obtained in the visible range of 400 nm-750 nm using a tetramerized nanorod metasurface. [29] In other words, full-band or local-band high absorption in the visible band has been realized. [30,31] Nevertheless, multilayer MoS 2 material exhibits near transparency in the infrared region due to the intrinsic band limitation and frequency dispersion, [32] which hinders further infrared optoelectronic applications.…”