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Theoretical investigation of metal-metal waveguides for terahertz quantum-cascade lasers

机译:太赫兹量子级联激光器的金属-金属波导的理论研究

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摘要

We report our theoretical investigations of metal-metal waveguides for terahertz quantum-cascade lasers. The device is considered as a planar, multilayer structure. The optical properties of constituent materials are calculated according to Drude-Lorenz model. The Helmholtz equation is solved numerically using transfer matrix method. We concentrate on selecting the proper metallic material for claddings to minimize the waveguide losses. In addition, we analyze the consequences of inserting Ti separation layers between claddings and semiconductor core for blocking the destructive diffusion of metals into the active layer and improving the adhesion.
机译:我们报告了对太赫兹量子级联激光器的金属-金属波导的理论研究。该装置被认为是平面的多层结构。根据Drude-Lorenz模型计算组成材料的光学性质。使用传递矩阵法数值求解Helmholtz方程。我们专注于为包层选择合适的金属材料,以最大程度地减少波导损耗。此外,我们分析了在覆层和半导体芯之间插入Ti隔离层对阻止金属向活性层的破坏性扩散并提高附着力的后果。

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