研究目的
To quantify the thermal resistance of quantum cascade lasers (QCLs) and increase the laser output by employing ridge structures with reduced thermal resistance.
研究成果
The study demonstrated that embedding the ridge with Au or Cu improves heat dissipation, reducing thermal resistance and increasing laser output. The static mode and structure function are effective methods for improving the heat dissipation of QCLs.
研究不足
The measurement positions of the thermoviewer do not accurately match those in the calculation, leading to differences in absolute values between experiment and simulation.
1：Experimental Design and Method Selection:
Three different QCL devices were prepared with ridges covered with SiO2, embedded with Au, and embedded with Cu. Temperature distributions were measured with a thermoviewer and analyzed with three-dimensional simulations.
2：Sample Selection and Data Sources:
QCL devices with different ridge structures were used. The temperature distributions were measured under varying input powers.
3：List of Experimental Equipment and Materials:
Thermoviewer (FSV-210L, Apiste Corp.), FloTHERM simulator (Siemens Product Lifecycle Management Software Inc.), T3Ster (Siemens AG).
4：Experimental Procedures and Operational Workflow:
The QCLs were cooled to specific temperatures, and electric power was applied to measure temperature distributions and laser outputs.
5：Data Analysis Methods:
Thermal resistance and capacity were analyzed using structure functions obtained from static mode measurements.
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