Effective energy coupling and preservation in a surface plasmon-light emitter coupling system on a metal nanostructure.
The simulation results of the coupling of a radiation dipole with a surface plasmon (SP), which is induced on a metal/dielectric interface of a single groove (SG) plus a grating structure, are demonstrated. With the SG structure, the dipole can effectively couple energy into an SP feature, which has a mixed nature of localized surface plasmon (LSP) and surface plasmon polariton (SPP). The SPP energy is confined by a grating structure with a well designed grating period and position. With such a cavity configuration, the SPP energy can be well preserved. Both the dipole-SP coupling behaviors in the frequency and time domains are numerically illustrated. The results are useful for designing a metal/dielectric interface nanostructure for implementing a SPASER (surface plasmon amplification by stimulated emission of radiation) system.
Shen
Chang-Wei
CW
Graduate Institute of Electronics Engineering, National Taiwan University, Taipei, Taiwan.
Wang
Jyh-Yang
JY
Chuang
Wen-Hung
WH
Chen
Hung-Lu
HL
Lu
Yen-Cheng
YC
Kiang
Yean-Woei
YW
Yang
C C
CC
Yang
Yin-Jay
YJ
D000465:Algorithms; D003198:Computer Simulation; D049329:Nanostructures; D020349:Surface Plasmon Resonance / Q000295:instrumentation / Q000379:methods; D013816:Thermodynamics