Open AccessConfined surface plasmon of fundamental wave and second harmonic waves in graphene nanoribbon arrays
Author(s) -
Renlong Zhou,
Sa Yang,
Dan Liŭ,
Guangtao Cao
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.25.031478
Subject(s) - graphene , grating , finite difference time domain method , optics , surface plasmon , plasmon , materials science , harmonic , coupled mode theory , surface plasmon polariton , physics , optoelectronics , refractive index , nanotechnology , quantum mechanics
The confined surface plasmon of fundamental wave and second harmonic wave (SHW) are investigated in graphene grating structure. The linear-optical absorption spectra with various fermi energy and carrier mobility are investigated with the finite difference time domain (FDTD) simulations and coupled mode theory (CMT). Based on the CMT, a theoretical model for the graphene grating is established to study the spectrum features of fundamental wave. The lifetimes of linear-optical resonant modes in theoretical model are investigated through the theoretical fitting of exact values in simulation, which are tunable with both the fermi energy and carrier mobility. We also have investigated the second-order nonlinearity of graphene grating by introducing the second-order nonlinear source. The proposed configuration and method are useful for research of the absorption, local field enhancement factor, lifetime of light, and nonlinear optical processes in highly integrated graphene photoelectric devices.