本文選題：集成光學(xué) + 慢光　； 參考：《北方工業(yè)大學(xué)》2017年碩士論文

【摘要】：全光網(wǎng)絡(luò)是未來通信技術(shù)發(fā)展的趨勢,而光緩存是實現(xiàn)全光通信的關(guān)鍵技術(shù),光子晶體具有結(jié)構(gòu)微小、設(shè)計靈活、常溫運行、光頻率可控等特點在實現(xiàn)慢光技術(shù)方面有著顯著的優(yōu)勢。近年來對傳統(tǒng)光子晶體的研究已經(jīng)日趨成熟,為了在保持較好的慢光特性的同時,進(jìn)一步降低慢光群速度,新型光子晶體結(jié)構(gòu)逐漸成為研究的熱點。本文以光子晶體慢光為課題,研究設(shè)計了混合結(jié)構(gòu)光子晶體,對光子晶體的慢光特性以及在光緩存方面的應(yīng)用展開了深入的研究。首先,本文對光子晶體的發(fā)展歷史和國內(nèi)外的研究狀況進(jìn)行了回顧和總結(jié),并且對光子晶體的概念、基本特性、實際應(yīng)用以及制備方法進(jìn)行了闡述。為后文提供了理論基礎(chǔ)。其次,介紹了慢光的實現(xiàn)原理和生成技術(shù)。當(dāng)分析研究光子晶體慢光的數(shù)值方法時,重點介紹了平面波展開法和時域有限差分方法,對于完整二維光子晶體結(jié)構(gòu),給出兩種求解能帶分布方法的詳細(xì)過程。在完整結(jié)構(gòu)光子晶體中引入缺陷,形成線缺陷光波導(dǎo)和耦合腔波導(dǎo)結(jié)構(gòu),分析了光子晶體結(jié)構(gòu)參數(shù)對慢光特性的影響。最后以三角晶格圓形介質(zhì)柱光子晶體結(jié)構(gòu)為基礎(chǔ),使用圓形散射元和橢圓形散射元進(jìn)行周期性排列,采用平面波展開法對所設(shè)計的耦合腔波導(dǎo)進(jìn)行仿真分析。結(jié)果表明,調(diào)整缺陷行橢圓形散射元長軸和短軸的參數(shù)有利于慢光性能的優(yōu)化。研究發(fā)現(xiàn),通過改變微腔周圍第一排兩種散射元的面積比,能夠在保持低色散的同時進(jìn)一步降低導(dǎo)模的群速度。將所設(shè)計的耦合腔應(yīng)用于光緩存中,分析了它的緩存能力。
[Abstract]:All-optical network is the development trend of communication technology in the future, and optical buffer is the key technology to realize all-optical communication. Photonic crystal has small structure, flexible design and operation at room temperature. The characteristics of controllable optical frequency have significant advantages in the realization of slow light technology. In recent years, the research of traditional photonic crystals has become more and more mature. In order to keep good slow light characteristics and further reduce the slow light group velocity, the new photonic crystal structure has gradually become a hot topic. In this paper, the slow light of photonic crystal is studied and designed. The slow light characteristics of photonic crystal and its application in optical buffer are studied deeply. Firstly, the development history of photonic crystals and the research situation at home and abroad are reviewed and summarized, and the concept, basic characteristics, practical application and preparation methods of photonic crystals are described. It provides a theoretical basis for the following articles. Secondly, the realization principle and generation technology of slow light are introduced. When the numerical method of slow light in photonic crystal is analyzed, the plane wave expansion method and the finite-difference time-domain method are introduced. For the complete two-dimensional photonic crystal structure, the detailed process of solving the energy band distribution method is given. The defects are introduced into the complete photonic crystal to form the linear defect optical waveguide and the coupling cavity waveguide structure. The influence of the photonic crystal structure parameters on the slow light characteristics is analyzed. Finally, based on the photonic crystal structure of circular dielectric cylinder with triangular lattice, the circular scattering elements and elliptical scattering elements are arranged periodically, and the coupled cavity waveguide is simulated by plane wave expansion method. The results show that adjusting the parameters of the long axis and short axis of the elliptical scattering elements is beneficial to the optimization of the slow light performance. It is found that by changing the area ratio of the first row of scattering elements around the microcavity, the group velocity of the guided modes can be further reduced while maintaining low dispersion. The designed coupling cavity is applied to optical buffer, and its cache ability is analyzed.
【學(xué)位授予單位】：北方工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN929.1;O734

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