Double embedded photonic crystals for extraction of guided light in light-emitting diodes

作者：Jewell Jason^*; Simeonov Dobri; Huang Shih Chieh; Hu Yan Ling; Nakamura Shuji; Speck James; Wei**uch Claude

来源：Applied Physics Letters, 2012, 100(17): 171105.

DOI：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.

• 出版日期2012-4-23