A Rigorous Coupled Wave Analysis of Auto-Cloning Photonic Crystals for Controlling Light Emission Characteristics of a GaN-Based Light Emitting Diode

• Main Authors: Chen, Shen-Hong, 陳憲宏
• Other Authors: Liu, Yung-Sheng
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/71768561127501672412

碩士 === 國立清華大學 === 光電工程研究所 === 97 === In this research, we used a “rigorous coupled wave analysis” to characterize the light extraction property of a two-dimension photonic crystal of GaN-based blue LED and optimize the geometric configuration of the photonic crystal via controlling the photonic band gap and the diffraction efficiency. An optimized geometric configuration of the photonic crystal obtained under such calculation is “grating pitch=250nm、optical thickness=(1.3/4*central wavelength)”the extraction efficiency achievable under such condition is 36.05%. This algorithm is more efficient than FDTD or other common by used algorithms. The optimized geometric configuration of the photonic crystal could serve as useful guidelines for fabrication and design.