Double embedded photonic crystals for extraction of guided light in light-emitting diodes
Double embedded photonic crystals for extraction of guided light in light-emitting diodes
复制标题
DOI：
10.1063/1.4705735
复制
发表时间：
2012-04-23
影响因子：
4
通讯作者：
Weisbuch, Claude
中科院分区：
文献类型：
--
作者：
Jewell, Jason;Simeonov, Dobri;Weisbuch, Claude
在氮化镓中嵌入两个光子晶体（PhCs）制备发光二极管（led），形成具有高度受限、强激发和良好提取基模的波导。这种结构改进了以前的PhC LED设计，减少了基模的提取长度，并建立了具有非常低吸收损耗的设计路径。用角分辨电致发光测量光输出。基模的提取长度沿着phc的Gamma-M方向测量为21-39 μ m，这比单phc器件的值短得多。这种结构为更高效的led和激光器开辟了道路。(C) 2012年美国物理研究所。[http://dx.doi.org/10.1063/1.4705735]
Light-emitting diodes (LEDs) were fabricated in gallium nitride with two embedded photonic crystals (PhCs), creating a waveguide with a highly confined, strongly excited, and well-extracted fundamental mode. This structure improves upon previous PhC LED designs by reducing the extraction length of the fundamental mode and establishing a path to designs with very low absorption losses. Optical output was measured with angular-resolved electroluminescence. The extraction length of the fundamental mode was measured to be 21-39 mu m along the PhCs' Gamma-M directions, which is much shorter than values reported for single-PhC devices. This structure opens the way to more efficient LEDs and lasers. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4705735]