研究目的
Investigating the thermal design considerations for III-N vertical-cavity surface-emitting lasers (VCSELs) to improve their output optical power through advanced self-consistent electro-opto-thermal numerical simulations.
研究成果
The study demonstrates that through optimum thermal design, the maximum output power of III-N VCSELs can be increased by over 100%. Key improvements include substrate thinning for hybrid DBR VCSELs, using metal support substrates and increasing cavity length for flip-chip VCSELs, and adjusting device diameters and cavity lengths for ELOG VCSELs.
研究不足
The study is limited by the computational expense of modeling DBRs and the assumption of uniform current spreading in the current aperture, which may not account for localized hotspots due to current crowding.
1：Experimental Design and Method Selection:
Advanced self-consistent electro-opto-thermal numerical simulations were used to study the thermal characteristics of three types of III-N VCSELs.
2：Sample Selection and Data Sources:
The epitaxial structure of a reference VCSEL was used, modifying only the DBR materials, n-GaN thickness, bonding material for flip-chipped VCSELs, and substrate thickness.
3：List of Experimental Equipment and Materials:
Not explicitly mentioned.
4：Experimental Procedures and Operational Workflow:
Simulations were conducted to analyze the effect of varying geometric and material parameters on the thermal resistance of VCSELs.
5：Data Analysis Methods:
The thermal resistance and its impact on the maximum output optical power were analyzed to identify key design parameters.
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