光子晶體在發光元件上的應用

Applications of Photonic Crystals in Light-Emitting Devices

蔡雅芝

《光學工程》 106期 (2009/06) Pp. 20-29

https://doi.org/10.30011/OE.200906.0003

摘要

本文介紹了光子晶體的發展及應用，尤其是光子晶體在發光元件上的應用，並以發光二極體爲例，說明光子晶體結構對於元件萃光率以及內部量子效率的影響。透過Purcell效應，光子晶體結構會改變活性介質的自發輻射率，藉由計算系統的侷部能態密度可以得知自發輻射被抑制或增強的程度，提供實驗上選擇活性介質在晶格中嵌入位置的依據。

關鍵字

光子晶體 ； 自發輻射 ； 發光二極體 ； 垂直面射型雷射

並列摘要

In this paper, we give a brief introduction to the development and potential applications of the photonic crystals, especially the applications in light-emitting devices. We focus on the light-emitting diodes and discuss the influences of photonic crystal structure on the light extraction rate and the internal quantum efficiency. Due to the Purcell effect, the spontaneous emission rate of an active medium will be altered by the presence of the photonic crystal structure in the device. The effect of suppression or enhancement can be evaluated by calculating the local density of photon states of the system. The result can serve as a guideline for the experiment to selectively insert active medium into the device according to requirement.

並列關鍵字

Photonic crystal ； spontaneous emission ； light-emitting diode ； vertical-cavity surface-emitting laser