Phase Shift of Plasmons excited by Slits in A Metal Film Illuminated by Oblique Incident TM Plane Wave
The interactions between the optical light and sub-wavelength structures in metal.lm have sparked great interest on surface plasmon polaritons (SPPs). One e.ective way to interpret these phenomena is to make use of the phase shift between the SPP excited and the incident wave. Many theoretical and experimental studies have shown that this shift approximate to p is intrinsic at normal incidence. In this paper, the phase shift at oblique incidence is analyzed and used to interpret the transmission e.ect for the.rst time to our knowledge. A simpli.ed 2D scattering formulation using vector.nite element method is set up. Simulations show the phase shift can be approximate to p over a large range of incidence angles. With this shift, the conditions for the enhanced or suppressed transmission and the corresponding destructive or constructive interference of SPPs at oblique incidence are achieved. The transmission e.ect for incidence angle not satisfying these conditions, as well as its potential applications is also discussed.
Phase shift surface plasmon polaritions oblique incidence vector .nite element method.
Guangyuan Li Anshi Xu
State Key Laboratory of Advanced Optical Communication Systems & Networks (PekingUniversity),School State Key Laboratory of Advanced Optical Communication Systems & Networks (Peking University),School
国际会议
2008亚太光通信会议(Asia-Pacific Optical Communications 2008)
杭州
英文
2008-10-26（万方平台首次上网日期，不代表论文的发表时间）