Optical tunneling effect of surface plasmon polaritons: A simulation study using particles method

研究成果: Conference contribution

摘要

The phenomenon of resonant tunneling through thin metal films with periodic narrow grooves is attributed to excitation of surface plasmon (SP) via the periodic structure coupler at the metal surface. In this paper, we will use the particle-in-cell (PIC) plasma simulation method to study the SP-mediated optical tunneling. The PIC method is a time-domain scheme to calculate self-consistently the interaction between the electromagnetic fields and the plasma particles. At the beginning of simulation, the mobile electrons and immobile positive ions are uniformly distributed in the thin Gaussian-shaped-grooved silver film with the plasma density calculated from silver's plasma frequency. The momentum collision-frequency method is employed to model the collision dissipation. For normally incident TM-polarized wave, the transmission coefficients peak at the SP resonant modes, similar to the results predicted by Drude model, except for with lower transmission coefficients. The variation of the averaged plasma energy with time exhibits some ripple-like patterns, which comes from the various competing processes of heating and cooling. But the temperature of the plasma has little effect on the transmission coefficient and the wave tunneling.

原文English
主出版物標題PIERS 2005 - Progress in Electromagnetics Research Symposium, Proceedings
頁面432-436
頁數5
出版狀態Published - 2005
事件Progress in Electromagnetics Research Symposium, PIERS 2005 - Hangzhou, China
持續時間: 2005 八月 222005 八月 26

出版系列

名字PIERS 2005 - Progress in Electromagnetics Research Symposium, Proceedings

Other

OtherProgress in Electromagnetics Research Symposium, PIERS 2005
國家/地區China
城市Hangzhou
期間05-08-2205-08-26

All Science Journal Classification (ASJC) codes

  • 電氣與電子工程
  • 凝聚態物理學
  • 輻射

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