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

• Published in: Chinese physics B Vol. 19; no. 12; pp. 466 - 471
• Main Author: 丁岚 刘劲松 王可嘉
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.12.2010
• Subjects: 时域有限差分法; 最高人民检察院; 表面等离子激元; 表面缺陷; 许可证; 设计师; 金属光栅
• ISSN: 1674-1056; 2058-3834
• DOI: 10.1088/1674-1056/19/12/127302

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.