光子晶體陣列的傳輸特性研究

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摘要 光子晶體是指具有光子帶隙特性的人造周期性電介質(zhì)結(jié)構(gòu)。我們研究光子晶體的目的是為了突破傳統(tǒng)光學(xué)衍射極限的限制，在納米量級(jí)上可以對(duì)光的傳播進(jìn)行控制，改善光學(xué)器件的微型化和高度集成化。COMSOL Multiphysics軟件是一款多物理場(chǎng)耦合的仿真軟件。我們主要的研究方法是采用COMSOL Multiphysics模擬光波在人造的砷化鎵晶體里面的傳播，并且研究砷化鎵晶體本身的屬性，主要是對(duì)砷化鎵晶體的能帶進(jìn)行分析。利用這個(gè)仿真軟件，我們模擬出光波在帶有轉(zhuǎn)彎的砷化鎵晶體通道的傳播。通過(guò)調(diào)節(jié)，我們得到，只有特定范圍內(nèi)的波長(zhǎng)的波才可以在砷化鎵晶體里傳播。經(jīng)過(guò)分析，砷化鎵圓柱之間的距離是影響波長(zhǎng)范圍的一個(gè)重要因素。

關(guān)鍵詞： 光子晶體、傳播、帶隙分析



The investigation of the light propagation in photonic crystal array
Abstract Photonic crystals are artificial periodic dielectric structure refers to the characteristics of photonic bandgap . While we do some research on photonic crystals ,we aim to overcome the conventional optical diffraction limit , so that we can control the propagation of light on the order of nanometers , improving the miniaturization and the integration of optical devices . COMSOL Multiphysics is a kind of software of dealing with problem related to coupled multi-physics simulation . The main research method we use is the combination with COMSOL Multiphysics . We take the advantage of COMSOL Multiphysics to simulate the propagation of wave inside of a artificial GaAs crystal . Beside we also do some investigation about GaAs itself , mainly on the analysis of energy band of GaAs crystal . With COMSOL Multiphysics , we successfully simulate the propagation of light wave in a GaAs crystal of the channel with a turn . By adjusting constantly ,we obtained a conclusion that only within a specific wavelength range can the wave propagate in a GaAs crystal . Through the analysis , the distance between the pillars determines a relationship between the wave number and the frequency of light wave that prevents light wave of certain wavelengths to propagate inside the GaAs crystal structure .


Key words: photonic crystal , propagation , bandgap analysis


目錄
引言 1
第一章 光子晶體 2
1.1光子晶體的原理及歷史簡(jiǎn)介 2
1.2光子晶體的分類 4
1.3光子晶體的制作 5
1.4光子晶體的應(yīng)用 6
第二章 基于COMSOL光子晶體陣列的傳輸模擬 9
2.1 COMSOL軟件的簡(jiǎn)介 9
2.2COMSOL軟件建模 10
2.2.1模型介紹 10
2.2.2模型定義 10
2.2.3結(jié)果和討論 11
2.3.4使用軟件建立幾何模型 12
2.3.5物理設(shè)置 13
2.3.6后處理和可視化 15
第三章 光子晶體的帶隙分析 18
3.1COMSOL軟件建模 18
3.1.1模型介紹 18
3.1.2模型說(shuō)明 18
3.1.3使用用戶作圖的界面建模 22
3.1.4物理設(shè)置 24
總結(jié)和展望 29
致謝 30
參考文獻(xiàn) 31