A wide bandgap plasmonic Bragg reflector.
Surface plasmon polaritons (SPPs) Bragg reflector with more excellent optical properties are investigated numerically. By introducing a finite array of periodic grooves on the two surfaces of metal-insulator-metal (MIM) waveguide, we fulfill the periodical changes of effective refractive index, which leads to the photonic band gap (PBG). And it has been further widened by inserting a dielectric material with higher refractive index in the waveguide with narrow slit width. Finite difference time domain (FDTD) simulation confirms the widened bandgap. In addition, a SPP nanocavity is introduced by breaking the periodicity of our proposed structure.
Liu
Jian-Qiang
JQ
School of Physics and Microelectronic, Hunan University, Changsha 410082, China.
Wang
Ling-Ling
LL
He
Meng-Dong
MD
Huang
Wei-Qing
WQ
Wang
Dianyuan
D
Zou
B S
BS
Wen
Shuangchun
S
D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008670:Metals / Q000737:chemistry*; D008962:Models, Theoretical; D012031:Refractometry / Q000379:methods*; D020349:Surface Plasmon Resonance / Q000379:methods*
D008670:Metals