Open AccessMonolayer-graphene-based perfect absorption structures in the near infrared
Author(s) -
Yansong Fan,
Chucai Guo,
Zhi Zhu,
Wei Xu,
Fei Wu,
Xiaodong Yuan,
Shi Qiao Qin
Publication year - 2017
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.25.013079
Subject(s) - materials science , optics , absorption (acoustics) , full width at half maximum , graphene , wavelength , monolayer , infrared , optoelectronics , resonance (particle physics) , physics , atomic physics , nanotechnology
Subwavelength perfect optical absorption structures based on monolayer-graphene are analyzed and demonstrated experimentally. The perfect absorption mechanism is a result of critical coupling relating to a guided mode resonance of a low index two-dimensional periodic structure. Peak absorption over 99% at wavelength of 1526.5 nm with full-width at half maximum (FWHM) about 18 nm is demonstrated from a fabricated structure with period of 1230 nm, and the measured results agree well with the simulation results. In addition, the influence of geometrical parameters of the structure and the angular response for oblique incidence are analyzed in detail in the simulation. The demonstrated absorption structure in the presented work has great potential in the design of advanced photo-detectors and modulators.