本文選題：表面等離子激元 + 類電磁誘導透明　； 參考：《湖南科技大學》2017年碩士論文

【摘要】：隨著集成電路的發(fā)展,傳統(tǒng)光子器件的作用在發(fā)展中受到限制,如何做出更小更集成化的電子元器件,是本領域研究的熱點。本文采用時域有限差分法(FDTD)進行數(shù)值仿真,研究了石墨烯和電介質(zhì)等微納材料的光學傳輸?shù)默F(xiàn)象和內(nèi)在物理機制,探討了實現(xiàn)其光學特性的方法和調(diào)控方式,得到了一些有趣的光學現(xiàn)象,例如類電磁誘導透明,光學雙穩(wěn)態(tài),通過對這些現(xiàn)象的研究,找到一些相應的調(diào)控的方式,為新的高效光電器件的設計提供了一些理論指導。本論文主要內(nèi)容如下:1)研究了雙層石墨烯納米帶單個和多個透明度窗口的調(diào)諧和機理。通過分析一系列不同寬度的石墨烯納米薄層的透射光譜,發(fā)現(xiàn)石墨烯納米帶數(shù)量和尺寸對透明度峰的位置有明顯的影響。另外,還發(fā)現(xiàn)通過在等離子體結(jié)構中加入更多的石墨烯納米帶單元,可以獲得多個類電磁誘導透明的光譜響應�；谑┑入x激元的類電磁誘導透明為光交換提供了可能。2)探討了基于微納金屬-克爾介質(zhì)的MIM波導結(jié)構的光學雙穩(wěn)態(tài)效應。研究中得到了明顯的光學雙穩(wěn)態(tài)回路。此外,還發(fā)現(xiàn)增加波導和納米腔之間的耦合距離,改變克爾介質(zhì)的寬度和厚度,改變等邊三角形空腔的高度及波導的折射率可以引起諧振波長的紅移和藍移。研究結(jié)果可以應用在高度集成的光學電路中。3)分析了環(huán)形介質(zhì)納米棒陣列的異常光學反射。研究結(jié)果顯示共振頻率可以通過改變環(huán)形介質(zhì)納米棒幾何參數(shù)來調(diào)諧,如環(huán)形納米棒陣列的外半徑,內(nèi)半徑及入射角等,從而可以為新型光學器件的設計提供了新的調(diào)節(jié)方式。
[Abstract]:With the development of integrated circuits, the role of traditional photonic devices is limited in the development. How to make smaller and more integrated electronic components is a hot topic in this field. In this paper, the finite difference time-domain (FDTD) method is used to simulate the optical transmission of graphene and dielectric materials, and the internal physical mechanism is studied. The method and control method to realize their optical properties are discussed. Some interesting optical phenomena, such as electromagnetically induced transparency and optical bistability, have been obtained. Through the study of these phenomena, some corresponding regulation methods have been found, which provide some theoretical guidance for the design of new efficient optoelectronic devices. The main contents of this thesis are as follows: 1) the tuning and mechanism of single and multiple transparency windows of double layer graphene nanobelts are studied. By analyzing the transmission spectra of a series of graphene nanocrystals with different widths, it is found that the number and size of graphene nanoribbons have an obvious influence on the position of the transparency peaks. In addition, it is also found that a number of electromagnetically induced transparent spectral responses can be obtained by adding more graphene nanowires into the plasma structure. Electromagnetically induced transparency based on graphene isotherms provides the possibility of optical exchange. 2) the optical bistable effect of MIM waveguide structure based on micro-nanometallic Kerr dielectric is discussed. A clear optical bistable loop is obtained. In addition, it is found that increasing the coupling distance between the waveguide and the nanoscale cavity, changing the width and thickness of the Kerr medium, changing the height of the equilateral triangular cavity and the refractive index of the waveguide can cause the red shift and blue shift of the resonant wavelength. The results can be used in highly integrated optical circuits to analyze the anomalous optical reflection of annular dielectric nanorods arrays. The results show that the resonant frequency can be tuned by changing the geometric parameters of nanorods in annular dielectric, such as the outer radius, internal radius and incident angle of the ring nanorod array, thus providing a new way for the design of new optical devices.
【學位授予單位】：湖南科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：O482.3;TB383.1

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本文編號：1906200