硅基光子晶体带隙增强的研究

发布时间：2019-07-04 19:29

【摘要】：硅基光子学的发展使突破微电子技术瓶颈成为可能,而硅基光子晶体在硅基光子学中拥有重要地位,将其独特的带隙特性应用到光学器件中,可以使硅基光子器件的性能与集成度得到显著提高。因此,增强带隙已成为硅基光子晶体研究的重要部分。本文首先对圆柱连接杆形光子晶体结构进行研究,研究结构分为三类:圆柱连接十字杆形光子晶体,圆柱连接斜交叉杆形光子晶体,圆柱连接正交叉杆形光子晶体。分别观察圆柱半径和杆的宽度的改变对其归一化带宽的影响并得出最优结构,并且在固定填充比的条件下观察归一化带宽随结构参数变化的规律。然后以铜币形散射元为基础构建了复式晶胞正方晶格二维光子晶体,探讨了结构参数对其禁带特性的影响,调节结构参数(外圆半径、方孔边长、介质杆宽度和方孔旋转角度)进行优化,得出最优归一化带宽,并与铜币形散射元正方晶格二维光子晶体结构进行了对比。最后研究了圆柱打孔形光子晶体,主要分四类:圆柱打一孔形光子晶体,圆柱打两孔形光子晶体,圆柱打三孔形光子晶体,圆柱打四孔形光子晶体。探讨了对称轴条数对圆柱打孔形光子晶体的影响。总而言之,本文设计了多种新型光子晶体结构并对其优化以使带隙增强,研究结果为硅基光子晶体获得较大的归一化完全禁带宽度提供了有效方法,为高性能的硅基光子晶体微腔、波导和滤波等器件的设计提供了理论参考。
[Abstract]:The development of silicon-based photonic science makes it possible to break through the bottleneck of microelectronics technology. Silicon-based photonic crystals play an important role in silicon-based photology. The application of its unique band-gap characteristics to optical devices can significantly improve the performance and integration of silicon-based photonic devices. Therefore, enhanced band gap has become an important part of silicon-based photonic crystals. In this paper, the structure of cylindrical connected rod photonic crystal is studied. The structure is divided into three categories: cylindrical connected cross rod photonic crystal, cylindrical connected oblique cross rod photonic crystal, cylindrical connected positive cross rod photonic crystal. The effects of the radius of the cylinder and the width of the rod on the normalized bandwidth are observed respectively, and the optimal structure is obtained, and the variation of the normalized band width with the structural parameters is observed under the condition of fixed filling ratio. Then, based on the copper coin scattering element, the two-dimensional photonic crystal of the square lattice of the compound cell is constructed, and the influence of the structural parameters on the band gap characteristics is discussed. The structural parameters (outer circle radius, square hole edge length, dielectric rod width and square hole rotation angle) are optimized, and the optimal normalization bandwidth is obtained, and the two-dimensional photonic crystal structure of the square lattice of the copper coin scattering element is compared with that of the copper coin scattering element square lattice. Finally, cylindrical punched photonic crystals are studied, which are mainly divided into four categories: cylindrical one-hole photonic crystal, cylindrical punched two-hole photonic crystal, cylindrical three-hole photonic crystal and cylindrical four-hole photonic crystal. The influence of the number of symmetrical axial strips on cylindrical punched photonic crystals is discussed. In a word, a variety of new photonic crystal structures are designed and optimized to enhance the band gap. The results provide an effective method for silicon-based photonic crystals to obtain a large normalized complete band gap, and provide a theoretical reference for the design of high performance silicon-based photonic crystal microcavities, waveguides and filtering devices.
【学位授予单位】：长春理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：O734

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