一維電漿光子晶體光電性質之研究

Abstract

在本論文中，我們研究了在一維電漿光子晶體（Plasma Photonic Crystals , PPCs）的光學性質。這裡將涉及兩個主題。第一個主題是探討二元和三元電漿光子晶體的有效電漿頻率。有效電漿頻率的數值計算是基於光子能帶結構。我們將分析電子密度、介電層的厚度、電漿層的厚度做為有效電漿頻率的函數。我們也把結果與有效的介質理論做比較。在第二個主題中，我們考慮將頻率操作在低於電漿頻率的有限電漿光子晶體。我們發現，這種結構可用於多通道濾波器設計。通道數等於N-1個，其中N為週期數。這是在微波應用中使用的多通道。In this thesis, we study the optical properties in the one-dimensional plasma photonic crystals (PPCs). Two topics will be involved here. The first topic is to investigate the effective plasma frequency for the binary and ternary PPCs. The effective plasma frequency is extracted based on the calculated photonic band structure. We analyze the effective plasma frequency as a function of electron concentration, thickness of dielectric layer, and the thickness of plasma layer. We also compare the results with the effective medium theory. In the second topic, we consider the finite PPC operating at frequencies below the plasma frequency. We find that this structure can be used to design a multichannel transmission filter. The number of channels is equal to N-1, where N is number of periods. This multichannel channel is of use in the microwave applications.