標題: Asymmetric design of photonic crystal surface-emitting lasers with low-threshold characteristics
作者: Hung, Chih-Tsang
Ho, Tsung-Lin
Lu, Tien-Chang
光電工程學系
Department of Photonics
公開日期: 10-Aug-2013
摘要: We present AlGaAs-InGaAs multiquantum wells photonic crystal surface-emitting lasers by using the transfer matrix method and coupled wave method to achieve a low-threshold operation. The extremely low-threshold gain is achieved by adopting an asymmetric cladding layer design to enhance both of the vertical optical confinement factors for the quantum wells and photonic crystal (PC). By modifying the composition of the AlGaAs layer to raise the refractive index in the p-type cladding, optical field distribution will obviously be shifted to the p side. Hence, it results in a significant coupling enhancement between the optical mode profile and the PC layer. The optimized value of the vertically optical confinement factor of the PC layer is 13.94%, and the corresponding threshold gain can be as low as 19.45 cm(-1). (C) 2013 Optical Society of America
URI: http://dx.doi.org/10.1364/AO.52.005851
http://hdl.handle.net/11536/22561
ISSN: 1559-128X
DOI: 10.1364/AO.52.005851
期刊: APPLIED OPTICS
Volume: 52
Issue: 23
起始頁: 5851
結束頁: 5855
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