光子晶體微共振腔輻射特性之模擬

Simulation on Radiation Characteristics of a Photonic Crystal Microcavity

陳廷仰(Tyng-Yang Chen)

指導教授 ： 江衍偉

國立臺灣大學/電機資訊學院/光電工程學研究所/碩士(2004年)

https://doi.org/10.6342/NTU.2004.00493

摘要

本論文中，我們模擬分析了各種光子晶體平板微共振腔的輻射特性。由於光子晶體具有布拉格反射和全反射的效應，光可以侷限在缺陷中，這類光子晶體可用於製作發光二極體。吾人利用三維之有限時域差分法，分別針對方形晶格和三角形晶格缺陷結構的輻射特性進行模擬。吾人先探討缺陷附近空氣洞大小和輻射特性的關係，接著調整空氣洞的位置和形狀。在某些結構下，只需稍微適當的改變缺陷附近的結構，便可有效增進輻射效率，而不需大幅改變整體的結構或介質的折射率。最後我們歸納一些結論，以供設計高效能發光二極體參考。

關鍵字

光子晶體

並列摘要

Abstract

In this thesis, the radiation characteristics of various kinds of photonic crystal slab microcavites are numerically investigated. Light is confined within the defect region by the combined action of distributed Bragg reflection and total internal reflection. This kind of photonic crystal has been employed in making a semiconductor light-emitting diode (LED). By using the three-dimensional finite-difference time-domain (FDTD) method, we calculate the radiation characteristics for the square-lattice or triangular-lattice microcavity consisting of a single defect. The relation between the radiation characteristics and the radii of air holes around the defect is discussed. Then, the positions and shapes of nearest holes are adjusted. In some structures, we only need to perform small adjustment of the defect geometry to get better radiation characteristics, without significantly changing the photonic crystal structure and refractive index of dielectric material. Some conclusions are drawn, which may be helpful for designing efficient LEDs.

並列關鍵字

photonic crystal

參考文獻

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