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首页> 外文期刊>IEEE Journal of Quantum Electronics >Thermal Modeling of Terahertz Quantum-Cascade Lasers: Comparison of Optical Waveguides
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Thermal Modeling of Terahertz Quantum-Cascade Lasers: Comparison of Optical Waveguides

机译:太赫兹量子级联激光器的热建模:光波导的比较

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摘要

We compare a set of experimental lattice temperature profiles measured in a surface-emitting terahertz (THz) quantum-cascade laser (QCL) with the results of a 2-D anisotropic heat diffusion model. We evaluate the temperature dependence of the cross-plane thermal conductivity $(kappa_{perp})$ of the active region which is known to be strongly anisotropic due to its superlattice-like nature. Knowledge of $kappa_{perp}$ and its temperature dependence is crucial in order to improve the temperature performance of THz QCLs and this has been used to investigate the longitudinal lattice temperature distribution of the active region and to compare the thermal properties of metal-metal and semi-insulating surface-plasmon THz optical waveguides using a 3-D anisotropic heat diffusion model.
机译:我们比较了在表面发射太赫兹(THz)量子级联激光器(QCL)中测得的一组实验晶格温度曲线与二维各向异性热扩散模型的结果。我们评估了有源区的跨平面热导率$(kappa_ {perp})$的温度依赖性,该有源区由于其类似超晶格的性质而具有很强的各向异性。为了提高THz QCL的温度性能,了解kappa_ {perp} $及其温度依赖性至关重要,已被用于研究有源区的纵向晶格温度分布并比较金属-金属的热性质。和使用3-D各向异性热扩散模型的半绝缘表面等离子体THz光波导。

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