High Power Conversion Efficiency Narrow Divergence Angle Photonic Crystal Laser Diodes

9xx nm laser diodes (LDs) with aluminum component continuous gradient photonic band crystal (CCG-PBC) waveguide structure are designed and fabricated. The simulation results indicate that the CCG-PBC structure can significantly reduce the heterojunction barrier and carrier accumulation at the interf...

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Bibliographic Details
Published in:IEEE photonics journal 2022-08, Vol.14 (4), p.1-6
Main Authors: Wang, Liang, Qi, Aiyi, Zhou, Xuyan, Fu, Ting, Xu, Chuanwang, Han, Renbo, Qu, Hongwei, Zheng, Wanhua
Format: Article
Language:English
Subjects:
Aluminum
Crystal structure
Efficiency
Energy conversion efficiency
Heterojunctions
High efficiency
Information technology
laser diodes
narrow divergence
Optical losses
Optical reflection
Optical refraction
Optical variables control
Optical waveguides
Optimization
photonic crystal
Photonic crystals
Semiconductor lasers
Waveguides
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Summary:9xx nm laser diodes (LDs) with aluminum component continuous gradient photonic band crystal (CCG-PBC) waveguide structure are designed and fabricated. The simulation results indicate that the CCG-PBC structure can significantly reduce the heterojunction barrier and carrier accumulation at the interface of the conventional PBC structure. We demonstrate that the LD with CCG-PBC structure can achieve a narrow vertical divergence angle of 16.2° at full width at half maximum, and the divergence angle changes with current not more than 0.5°. Meanwhile, the power conversion efficiency (PCE) of the narrow divergence angle LD can reach 66.7%, and the PCE at 20 W is still over 60%. After optimizing the coating reflectivity and cavity length of the CCG-PBC structure LD, the peak PCE and power are 71.5% and 17.2 W at 25 °C and 77.7% and 23.3 W at 0 °C, respectively, which are optimal results for any edge-emitting LD. Our device provides valuable guidance for researching high power and high efficiency narrow vertical divergence angle LDs.
ISSN:1943-0655
1943-0655
1943-0647
DOI:10.1109/JPHOT.2022.3192929