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首页> 外文期刊>Acta Physica Polonica >Generation of Terahertz Radiation by Large-Aperture Photoconductive Antennas in Condition of a High Level Excitation
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Generation of Terahertz Radiation by Large-Aperture Photoconductive Antennas in Condition of a High Level Excitation

机译：高水平激发条件下大孔径光导天线产生太赫兹辐射

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摘要

Theoretical and experimental results about generation coherent terahertz (THz) radiation in photoconductive medium in condition of a high level excitation are presented. Employing self-consistent analytical approach to the set of non-equilibrium Boltzmann equation for charge carriers and Maxwell equations for electromagnetic radiation we have studied the radiation phenomena in non-equilibrium e-h plasma excited in the photoconductive gap of terahertz radiating large-aperture photoconductive antenna by an ultrashort laser pulse. Equally with the effect of the radiation screening, the effect of the non-linear absorption of an optical pump pulse (bleaching of photoconductive medium) was taken into account. It was shown that the effect of nonlinear absorption reconstructs the dynamics of the generation of terahertz radiation and must take into account the effects associated with the spread of the generated wave and the wave of excitation.
机译：给出了在高水平激发条件下在光导介质中产生相干太赫兹（THz）辐射的理论和实验结果。对电荷载流子的非平衡Boltzmann方程和电磁辐射的Maxwell方程组采用自洽分析方法，研究了太赫兹辐射大孔径光电导天线的光导间隙中激发的非平衡eh等离子体中的辐射现象。超短激光脉冲。同样地，与辐射屏蔽的效果一样，也考虑了光泵浦脉冲的非线性吸收（光电导介质的漂白）的影响。结果表明，非线性吸收的影响重建了太赫兹辐射产生的动力学，并且必须考虑与所产生的波的传播和激发波的传播相关的影响。

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