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A Fast Method for Estimation of Terahertz Polarization in a Semiconductor Nanodimer

机译:一种快速估计半导体纳米二聚层中的太赫兹极化的方法

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Plasmonic interactions in semiconductor nanoparticles offer the potential of sensors and devices applications in the terahertz frequency range. Charge transport based analysis and simulation of polarization in a semiconductor nanodimer are computationally intensive. A point-dipole decomposition formulation to facilitate time-efficient estimation of the total dipole moment induced by a terahertz electric field on a semiconductor nanodimer is presented. Coupling interactions among the constituent dipoles characterized by their effective local fields provide the basis for a system of algebraic equations from which the total polarization of the dimer can be obtained. Numerical results by this formulation are in very good agreement with that obtained with a finite-element simulation tool applied directly on the nanodimer, with provision to account for space-charge effects.
机译:半导体纳米颗粒中的等离子体相互作用提供了在太赫兹频率范围内的传感器和装置应用的潜力。基于电荷传输的分析和半导体纳米层中偏振的分析和仿真是计算密集的。提出了一种点 - 偶极分解制剂,以便于在半导体纳米体上诱导的太赫兹电场诱导的总偶极矩的时间有效估计。由其有效局部场特征的组成偶极子之间的耦合相互作用为可以获得二聚体的总偏振的代数方程系统提供基础。该配方的数值结果与直接施加在纳米二极体上的有限元模拟工具的达成非常良好的协议,以考虑空间电荷效应。

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