Mode manipulation and near-THz absorptions in binary grating-graphene layer structures
1 Department of Physics, Harbin Institute of Technology, Harbin 150001, China
2 Key Lab of Micro-Optics and Photonic Technology of Heilongjiang Province, Harbin 150001, China
Nanoscale Research Letters 2014, 9:90 doi:10.1186/1556-276X-9-90Published: 21 February 2014
The excitation and absorption properties of grating coupled graphene surface plasmons were studied. It was found that whether a mode can be excited is mainly determined by the frequency of incident light and the duty ratio of gratings. In the structure consisting graphene bilayer, a blueshift of the excitation frequency existed when the distance between neighbor graphene layer were decreased gradually. In graphene-grating multilayer structures, a strong absorption (approximately 90% at maximum) was found in near-THz range.