標題: Effects of Lattice Types on GaN-Based Photonic Crystal Surface-Emitting Lasers
作者: Wu, Tzeng-Tsong
Chen, Chih-Cheng
Lu, Tien-Chang
光電工程學系
Department of Photonics
公開日期: 1-Jan-2015
摘要: GaN-based photonic crystal (PC) surface emitting lasers with different lattice types including hexagonal, square, and honeycomb lattice were fabricated and characterized. Laser characteristics including threshold conditions, lasing spectra, polarization, and divergence angle of devices with different lattice have been studied and discussed. The threshold energy density of the device with honeycomb, hexagonal, and square lattice was measured to be approximately 1.6, 2.3, and 3.8 mJ/cm(2) at room temperature, showing superior characteristics of applying honeycomb as PC lattice patterns. Moreover, the experimental results were matched well to the theoretical prediction using the multiple scattering method. Finally, the laser characteristics of devices with three lattice types such as divergence angle and degree of polarization (DOP) were analyzed and discussed. The device with honeycomb lattice shows low threshold, high DOP of 86%, and low divergence angle of 1.3 degrees among three lattice types, demonstrating its potential in the future surface emitting laser sources.
URI: http://dx.doi.org/10.1109/JSTQE.2014.2358086
http://hdl.handle.net/11536/25303
ISSN: 1077-260X
DOI: 10.1109/JSTQE.2014.2358086
期刊: IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
Volume: 21
Issue: 1
起始頁: 1
結束頁: 6
Appears in Collections:Articles