Far-Field and Near-Field Distribution of GaN-Based Photonic Crystal LEDs With Guided Mode Extraction
Authors:
- Chun-Feng LaiCLChun-Feng Lai
- Jim-Yong ChiJCJim-Yong Chi
- Hao-Chung KuoHKHao-Chung Kuo
- Hsi-Hsuan YenHYHsi-Hsuan Yen
- Chia-En LeeCLChia-En Lee
- Chia-Hsin ChaoCCChia-Hsin Chao
- Wen-Yung YehWYWen-Yung Yeh
- Tien-Chang LuTien-Chang Lu
- 12 June 2009
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Journal of Selected Topics in Quantum Electronics
- Vol. 15 (4) , 1234-1241
Abstract
The near-field and far-field distribution of GaN LEDs with square photonic crystal (PhC) lattice are experimentally investigated. The optical images of the near-field pattern are obtained from the guided electroluminescent light generated at the center of a special annular structure. For increasing lattice constant, symmetric patterns with varying number of petals according to the symmetry of the PhC are observed. The far-field distribution is studied with GaN-based film-transferred PhC LEDs with the thickness about 1500 nm. Angular-resolved measurements under electrical injection revealed guided modes extraction behavior and polarization based on the Bragg's diffraction with the PhC lattice. Good agreement with the two-dimension free photon band structure is obtained.Keywords
This publication has 14 references indexed in Scilit:
- Nitride-Based Thin-Film Light-Emitting Diodes With Photonic Quasi-Crystal SurfaceIEEE Photonics Technology Letters, 2009
- Polarized light emission from photonic crystal light-emitting diodesApplied Physics Letters, 2008
- Anisotropy of light extraction from GaN two-dimensional photonic crystalsOptics Express, 2008
- Polarization of light emission by 460nm GaInN∕GaN light-emitting diodes grown on (0001) oriented sapphire substratesApplied Physics Letters, 2007
- Photonic Crystal-Assisted Light Extraction from a Colloidal Quantum Dot/GaN Hybrid StructureNano Letters, 2006
- Photonic crystal laser lift-off GaN light-emitting diodesApplied Physics Letters, 2006
- Photonic bands in two-dimensionally patterned multimode GaN waveguides for light extractionApplied Physics Letters, 2005
- InGaN/GaN quantum-well heterostructure light-emitting diodes employing photonic crystal structuresApplied Physics Letters, 2004
- Nearly free-photon approximation for two-dimensional photonic crystal slabsPhysical Review B, 2001
- Photonic band structure of dielectric membranes periodically textured in two dimensionsPhysical Review B, 2000