Effects of a one-dimensional surface defect on designer surface plasmon polaritons  

作　　者：丁岚 刘劲松 王可嘉 

机构地区：[1]Wuhan National Laboratory for Optoelectronics,School of Optoelectronic Science and Engineering,Huazhong University of Science and Technology

出　　处：《Chinese Physics B》2010年第12期466-471,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant No. 10974063);the Research Foundation of Wuhan National Laboratory (Grant No. P080008);the National Basic Research Program of China (Grant No. 2007CB310403)

摘　　要：By using a finite difference time domain （FDTD） method, the effects of a one-dimensional （1D） surface defect on designer surface plasmon polaritons （designer SPPs） supported by a 1D metallic grating in THz domain are investigated. When the size of the defect is in a special range which is not too large, the designer SPPs reflected and scattered by the defect are weak enough to be neglected. The defect only induces a disturbance in the energy distribution of the designer SPP supported by the whole defect grating. If the defect size exceeds the said range, the reflecting and scattering are dominant in the influences of the defect on designer SPPs. Our analysis opens opportunities to control and direct designer SPPs by introducing a 1D defect, especially in low frequency domain.By using a finite difference time domain （FDTD） method, the effects of a one-dimensional （1D） surface defect on designer surface plasmon polaritons （designer SPPs） supported by a 1D metallic grating in THz domain are investigated. When the size of the defect is in a special range which is not too large, the designer SPPs reflected and scattered by the defect are weak enough to be neglected. The defect only induces a disturbance in the energy distribution of the designer SPP supported by the whole defect grating. If the defect size exceeds the said range, the reflecting and scattering are dominant in the influences of the defect on designer SPPs. Our analysis opens opportunities to control and direct designer SPPs by introducing a 1D defect, especially in low frequency domain.

关 键 词：surface states surface plasmons electromagnetic theory GRATING 

分 类 号：TN25[电子电信—物理电子学] O53[理学—等离子体物理]