Regrowth-free blue GaN-based photonic crystal surface-emitting lasers with triangular air holes
Abstract
We report the successful realization of a room-temperature blue GaN photonic crystal surface-emitting laser (PCSEL) diode fabricated using a regrowth-free approach. By employing a square lattice photonic crystal structure with modified triangular air holes, we achieve robust two-dimensional single-mode lasing. The device operates with a threshold current density of 5.2 kA/cm2 and emits a Gaussian-shaped beam with exceptionally low beam divergence, measured at 1.15 mrad (0.066°). Furthermore, the symmetry-breaking nature of the triangular air holes enforces a stable linear polarization perpendicular to the long edge of the triangle. This work demonstrates that high-beam-quality blue PCSELs can be achieved using non-regrowth fabrication processes with simple hole geometry, paving the way for high-performance blue laser sources.
Article Details
Journal Info
Applied Physics Letters
American Institute of Physics
Authors (18)
Zhiwei Sun
State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering
Bolin Zhou
Suzhou Laboratory 1 , Suzhou 215123,
Yuzhen Zheng
Yongchen Miao
Suzhou Laboratory 1 , Suzhou 215123,
Xiaoqi Yu
Tong Xu
Junfei Wang
Suzhou Laboratory 1 , Suzhou 215123,
Maoqing Ling
Department of Electrical and Electronic Engineering, the School of Advanced Technology, Xi'an Jiaotong-Liverpool University 4 , Suzhou 215123,
Xinrui Wang
State Key Laboratory of Flexible Electronics (LOFE), Institute of Advanced Materials (IAM) & School of Flexible Electronics (Future Technologies)
Suman Xia
Suzhou Laboratory 1 , Suzhou 215123,
Zhi Liu
Laboratory of Atmospheric Environment and Pollution Control
Zengcheng Li
Suzhou Ganbright Optoelectronic Technology Co., Ltd 5 ., Suzhou 215153,
Pengyan Wen
Suzhou Laboratory 1 , Suzhou 215123,
Wen Liu
Kanglin Xiong
Suzhou Laboratory 1 , Suzhou 215123,
Jianping Liu
Huaibing Wang
Suzhou Laboratory 1 , Suzhou 215123,
Hui Yang