摘要
研究了具有周期性孔阵列的金属表面附近的电磁局域态密度(EM-LDOS),详细讨论了孔的填充因子和孔内填充介质对EM-LDOS的影响。相对于金属平板,具有孔阵列的金属表面附近的EM-LDOS的共振峰会发生分裂;随着填充因子的增加,横向表面等离子体激元的共振峰向低频方向移动,而纵向表面等离子体激元的共振峰向高频方向移动。当孔内填充具有更大介电常数的材料时,EM-LDOS谱中分裂的两个峰都会向低频方向移动,但低频峰的移动相对于高频峰的更为显著。
The electromagnetic local density of states （EM-LDOS） near the surface of metal with periodic hole arrays is studied. The influences of the filling factor and the filling material in holes on the EM-LDOS are also discussed. Compared with that near the surface of the metal plate, the EM-LDOS resonance peak near the surface of metals with periodic hole arrays can split. When the filling factor increases, the resonance peak of transverse surface plasmon polaritons shifts in the low-frequency direction, while the resonance peak of longitudinal surface plasmon polaritons shifts in the high-frequency direction. When the dielectric constant of the filling material increases, both of the splitted peaks shift in the low-frequency direction, while the low-frequency peak shifts more remarkably.
出处
《激光与光电子学进展》
CSCD
北大核心
2017年第7期297-303,共7页
Laser & Optoelectronics Progress
基金
国家自然科学基金(11264029
11664024
61367006)
江西省自然科学基金(2015BAB202017)
关键词
表面光学
表面等离子体激元
局域态密度
有效介质理论
表面波
optics at surfaces
surface plasrnon polaritons
local density of states
effective medium theory
surface waves
