Open AccessEnhanced graphene absorption and linewidth sharpening enabled by Fano-like geometric resonance at near-infrared wavelengths
Author(s) -
Feng Liu,
L. Chen,
Qiushi Guo,
J. Chen,
Xiaojing Zhao,
Wangzhou Shi
Publication year - 2015
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.23.021097
Subject(s) - laser linewidth , graphene , fano resonance , materials science , optics , optoelectronics , resonance (particle physics) , infrared , absorption (acoustics) , wavelength , guided mode resonance , photodetector , plasmon , physics , nanotechnology , laser , atomic physics , diffraction grating
We theoretically investigate the light-graphene interactions enabled by a single layer of nonlossy nanorods at near-infrared wavelengths. The sustained Fano-like geometric resonance gives rise to enhanced graphene absorption, e.g., 100%, and adjustable absorption linewidth even to be ultra-narrow, e.g., < 1 nm. The conditions for such graphene absorption enhancement and linewidth sharpening are analytically interpreted within the framework of temporal coupled mode theory for the Fano resonance. The geometric resonance enhanced light-graphene interactions are polarization-sensitive and angle-dependent. Our study offers new possibilities towards designing and fabricating novel opto-electronic devices such as graphene-integrated monochromatic photodetectors and ultra-compact modulators.