Surface plasmon interference formed by tightly focused higher polarization order axially symmetric polarized beams  

作　　者：周哲海 谭峭峰 金国藩 

机构地区：[1]State Key Laboratory of Precision Measurement Technology and Instruments,Tsinghua University [2]Department of Optical Information Science and Technology,Beijing Information Science and Technology University

出　　处：《Chinese Optics Letters》2010年第12期1178-1181,共4页中国光学快报（英文版）

基　　金：supported by the National "973" Program of China (No.2007CB935303);the National Natural Science Foundation of China (No.60908015);the General Program of Beijing Municipal Commission of Education (No.KM200910772005)

摘　　要：We numerically study the surface plasmon interference formed by tightly focused higher polarization order axially symmetric polarized beams （ASPBs） based on the vectorial diffraction theory. The definition of ASPBs is stated, and the optical setup for surface plasmon polariton （SPP） excitation and mathematical expressions for interfering SPP fields are proposed. The simulation results show that the interfering SPP fields present a multi-focal spot pattern. In addition, the number of spots is related to the polarization order of the incident beams P as 2×（P-1）, indicating potential utilization in near-field multiple optical trapping and near-field imaging and sensing. The unique interfering phenomenon is also explained.We numerically study the surface plasmon interference formed by tightly focused higher polarization order axially symmetric polarized beams （ASPBs） based on the vectorial diffraction theory. The definition of ASPBs is stated, and the optical setup for surface plasmon polariton （SPP） excitation and mathematical expressions for interfering SPP fields are proposed. The simulation results show that the interfering SPP fields present a multi-focal spot pattern. In addition, the number of spots is related to the polarization order of the incident beams P as 2×（P-1）, indicating potential utilization in near-field multiple optical trapping and near-field imaging and sensing. The unique interfering phenomenon is also explained.

关 键 词：Particle beams PLASMONS Surface plasmon resonance 

分 类 号：O436.3[机械工程—光学工程]