本質與外質電漿光子晶體光學性質之研究

Abstract

本論文探討以電漿做為介質的光子晶體相關結構光學性質，主要以轉移矩陣法(Transfer matrix method, TMM)做計算及模擬，論文分三個主題。 主題一討論電磁波於電漿結構中利用表面電漿共振(Surface Polariton Resonance, SPR)的傳輸情形，電漿結構原本因入射電磁波頻率低於電漿頻率而產生屏蔽效應，然而利用表面共振的特性得以進行傳輸，接著探討結構變化對表面電漿共振的影響。 主題二討論可調式外質電漿光子晶體，利用外部電磁場的改變來實現不同的光學性質及缺陷模，其特色在於能在不改變結構的前提下完成各式調變。 主題三利用介電質-電漿光子晶體設計多通道濾波器，探討結構變化對濾波特性的改變，接著討論結構的光子能隙及調變方法。This thesis is to study the optical properties in some related photonic structures based on the use of plasma as a constituent. We use the transfer matrix method (TMM) to do our calculations and analyses. We shall investigate three topics in our work. The first topic is to investigate the transmission properties in a plasma-based layered structure. With the operating frequency being lower than the plasma frequency, the resonance transmission can occur by inducing the surface polariton resonance. The structural condition for the resonance transmission will be investigated and discussed. The second topic is to study the photonic band structure and defect mode in an extrinsic plasma photonic crystal. By changing different parameters, especially the allied magnetic field, we can obtain the tunable optical properties such kind of extrinsic photonic crystal. In the third topic, we consider a finite plasma-dielectric photonic crystal operated in the negative-permittivity region. We find that a multichannel filter can be obtained. We also investigate how the channels can be shifted as a function of different methods.