標題: Far-Field and Near-Field Distribution of GaN-Based Photonic Crystal LEDs With Guided Mode Extraction
作者: Lai, Chun-Feng
Chi, Jim-Yong
Kuo, Hao-Chung
Yen, Hsi-Hsuan
Lee, Chia-En
Chao, Chia-Hsin
Yeh, Wen-Yung
Lu, Tien-Chang
光電工程學系
Department of Photonics
關鍵字: GaN;LEDs;photonic crystal (PhC)
公開日期: 1-Jul-2009
摘要: 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.
URI: http://dx.doi.org/10.1109/JSTQE.2009.2015582
http://hdl.handle.net/11536/7059
ISSN: 1077-260X
DOI: 10.1109/JSTQE.2009.2015582
期刊: IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
Volume: 15
Issue: 4
起始頁: 1234
結束頁: 1241
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