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光子晶体结构参数的随机扰动对光子晶体LED出光效率的研究 被引量:16

Effect of Random Perturbation of Structural Parameters on the Light Extraction Efficiency of Light Emitling Diode with Photonic Crystal
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摘要 利用光子晶体(PC)的光子禁带和光栅衍射效应可以提高发光二极管(LED)的出光效率,扩大LED的应用范围。在GaN基蓝光LED的GaN层上引入二维正方排列圆柱形PC,采用时域有限差分方法研究光子晶体的几何参数的随机扰动对LED出光效率的影响,利用禁带理论分析了其机理。 Using photonic bandgap of photonic crystals(PC) and the grating diffraction effect can improve the efficiency of the light from the light emitling diode(LED),it can expand the application scope of the LED.PC with square lattice of cylindrical unit cells are fabricated in GaN layer of GaN-based blue LED,the light extraction efficiency of GaN-based blue LED influenced by random perturbation of structural parameters are studied by finite-difference time-domain method and its mechanism is analyzed by the bang gap theory.
出处 《光学学报》 EI CAS CSCD 北大核心 2010年第1期233-236,共4页 Acta Optica Sinica
基金 上海市科委纳米技术专项基金(0752nm014)资助课题
关键词 光电子学 光子晶体 时域有限差分 发光二极管 禁带 随机扰动 optoelectronics photonic crystal finite-difference time-domain(FDTD) light-emitting diode(LED) band gap random perturbation
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