Open AccessGraphene plasmonics for surface enhancement near-infrared absorptivity
Author(s) -
Qinghui Pan,
Jianxun Hong,
Guohua Zhang,
Yong Shuai,
HePing Tan
Publication year - 2017
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.016400
Subject(s) - graphene , materials science , molar absorptivity , plasmon , surface plasmon polariton , absorption (acoustics) , dielectric , optics , optoelectronics , infrared , surface plasmon resonance , monolayer , surface plasmon , graphene nanoribbons , nanotechnology , physics , nanoparticle , composite material
Monolayer graphene has poor absorption in the near-infrared region. Its layer is only as thick as a single atom so it cannot have a high absorptivity. In this paper, in order to form a hybrid system, the absorption characteristics of monolayer graphene covering a metal/dielectric/metal substrate has been theoretically analyzed. The magnetic polaritons in the metal/dielectric couple with the plasmonic resonance in the graphene to dramatically enhance the graphene absorptivity. This study analyzes the factors that enhance the absorptivity, including the geometric parameters and the relative positions of the graphene. The local electromagnetic field and the power dissipation density are illustrated to explain the underlying mechanisms further. These numerical results can provide potential application in the field of optical detection and optoelectronic devices.