研究目的
To enhance the radiant efficacy of vertical-cavity surface-emitting laser (VCSEL) devices using enhanced specular reflection (ESR) structures with an opening circle window (OCW) to recycle backward scattered light.
研究成果
The proposed ESR structures can significantly enhance the radiant efficacy for VCSEL devices with scattering elements, which shows great potential for applications related to illumination and 3-D imaging.
研究不足
The optical performances of VCSEL devices with ESR structures are sensitive to the optical properties of the lead-frame and the scattering element. Optimization of the proposed structure by taking into consideration these two elements is still necessary to improve the light distributions and efficiency of VCSEL devices.
1：Experimental Design and Method Selection:
The study used the ray-tracing method to optimize the diameter of the OCW and the thickness of the ESR structure.
2：Sample Selection and Data Sources:
VCSEL devices with and without ESR structures were fabricated and compared.
3：List of Experimental Equipment and Materials:
The scattering layer consisted of a mixture of TiO2 nanoparticles and PDMS, and the ESR was purchased from 3M. The VCSEL chip was purchased from HLJ Technology.
4：3M. The VCSEL chip was purchased from HLJ Technology. Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The optical parameters, including intensity distributions, radiant power, and spectra, were tested using an integrated sphere system.
5：Data Analysis Methods:
Monte Carlo ray tracing was used to optimize the VCSEL device using the commercial software TracePro.
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