激光技术2019，Vol.43Issue(2)：184-188,5.DOI:10.7510/jgjs.issn.1001-3806.2019.02.007
GaN基蓝光LED单偏振输出及高光提取效率的实现
Realization of single polarization output and high light extraction efficiency of GaN based blue LED
摘要
Abstract
In order to improve light extraction efficiency of a flip-chip light-emitting diode (LED) and realize single polarization light output, three models of normal, flip-chip and integrated metal sub-wavelength grating flip-chip LED were established. RSOFT software was used to simulate and optimize the device, and theoretical analysis and simulation verification were carried out. The results show that, flip-chip LED can improve the light extraction efficiency, but it is very sensitive to the thickness of P-GaN layer and can not output single polarized light. Flip-chip LED integrated with metal sub-wavelength grating can achieve single polarized light output without the influence of P-GaN layer thickness; this kind of LED can output stable polarized light, but it is heavily affected by grating parameters and thickness of transition layer. The thickness of transition layer and parameters are very significant. By optimizing the structure, the extraction efficiency can reach 57.63％ and the polarization extinction ratio can reach 25.8 dB. The research has some guidance for manufacturing blue ray LED with high performance.关键词
衍射与光栅/光提取效率/RSOFT软件/发光二极管/消光比/单偏振Key words
diffraction and gratings/light extraction efficiency/RSOFT software/light-emitting diode/extinction ratio/single polarization分类
信息技术与安全科学引用本文复制引用
江达飞,江孝伟,张丽娜..GaN基蓝光LED单偏振输出及高光提取效率的实现[J].激光技术,2019,43(2):184-188,5.基金项目
国家自然科学基金资助项目(61650404) （61650404）
浙江省教育厅一般科研资助项目(Y201738091) （Y201738091）
衢州市科技计划资助项目(2017G16) （2017G16）
新苗人才计划校级资助项目(QZY17X013) （QZY17X013）
