Open AccessLarge spatial shifts of reflective beam at the surface of graphene/hBN metamaterials
Author(s) -
Haoyuan Song,
Shufang Fu,
Qiang Zhang,
Sheng Zhou,
Xuan-Zhang Wang
Publication year - 2021
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.420925
Subject(s) - optics , metamaterial , beam (structure) , light beam , materials science , graphene , brewster's angle , reflectivity , fresnel equations , total internal reflection , physics , refractive index , brewster , nanotechnology
We theoretically studied the Goos-Hänchen (GH) and Imbert-Fedorov (IF) shifts of reflective beam at the surface of graphene/hBN metamaterials. The results show that the GH-shift is significantly enhanced and also possesses the large reflectivity when the light beam is incident at the critical angle near the Brewster angle. We found that the IF-shift is the largest when the reflective beam is a special polarized-beam or the reflective coefficients satisfy the conditions |r s | = |r p | and φ s - φ p = 2jπ (j is an integer). By changing the chemical potential, filling ratio and tilted angle, the position and width of frequency windows obtaining the maximum values of shifts can be effectively adjusted. The large and tunable GH- and IF-shifts with the higher reflectivity provide an alternative scheme to develop new nano-optical devices.