Studies of the temporal and spectral shape of terahertz pulses generated from photoconducting switches
Studies of the temporal and spectral shape of terahertz pulses generated from photoconducting switches
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研究光电导开关产生的太赫兹脉冲的时间和光谱形状
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
J. Kuhl
中科院分区：
文献类型：
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作者：
C. Ludwig;J. Kuhl
我们对在 LT-GaAs 上制造的光电导开关作为太赫兹脉冲源的工作条件进行了系统研究。我们发现太赫兹脉冲强度和光谱对偏置电压和激发密度有明显的依赖性，这可以用载流子动力学和电偏置场的屏蔽来解释。这项研究为选择最佳操作参数提供了指导，以便在给定的光电导开关几何形状下获得短太赫兹脉冲。
We present a systematic investigation of the operation conditions of photoconductive switches fabricated on LT‐GaAs as sources of THz pulses. We find a pronounced dependence of the THz pulse intensities and spectra on bias voltage and excitation density, which can be explained in terms of carrier dynamics and screening of the electric bias field. This study provides guidelines for the selection of the optimal operation parameters to obtain short THz pulses with a given geometry of the photoconductive switch.