中国物理B ›› 2010, Vol. 19 ›› Issue (12): 127302-127302.doi: 10.1088/1674-1056/19/12/127302

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

丁岚, 刘劲松, 王可嘉   

  1. Wuhan National Laboratory for Optoelectronics, School of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
  • 收稿日期:2010-02-06 修回日期:2010-04-06 出版日期:2010-12-15 发布日期:2010-12-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 10974063), the Research Foundation of Wuhan National Laboratory (Grant No. P080008), and the National Basic Research Program of China (Grant No. 2007CB310403).

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

Ding Lan(丁岚), Liu Jin-Song(刘劲松), and Wang Ke-Jia(王可嘉)   

  1. Wuhan National Laboratory for Optoelectronics, School of Optoelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
  • Received:2010-02-06 Revised:2010-04-06 Online:2010-12-15 Published:2010-12-15
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 10974063), the Research Foundation of Wuhan National Laboratory (Grant No. P080008), and 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.

Abstract: 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.

Key words: surface states, surface plasmons, electromagnetic theory, grating

中图分类号:  (Polaritons (including photon-phonon and photon-magnon interactions))

  • 71.36.+c
73.20.Mf (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))