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Coherently controlled terahertz source for a time domain spectroscopy system via injection current in bulk ZnSe

机译:通过批量ZnSe中的注入电流对时域光谱系统进行相干控制的太赫兹源

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摘要

We have observed terahertz generation via injection current induced by harmonically related two-color beams in an unbiased ZnSe bulk at room temperature using a femtosecond Ti:sapphire oscillator. The terahertz intensity is just several times smaller than that obtained via optical rectification and further enhancements are believed possible. Experimental results demonstrate that the terahertz radiation is mainly attributed to the transition from the split-off band. This conclusion provides a novel approach to effectively generate a broadband and coherently controlled terahertz radiation, which leads to practical applications of terahertz radiation via this mechanism.
机译:我们已经观察到在室温下使用飞秒Ti:蓝宝石振荡器通过谐波相关的双色光束在无偏ZnSe体中感应注入电流产生太赫兹。太赫兹强度仅比通过光学整流获得的太赫兹强度小几倍,并且可以进一步增强。实验结果表明,太赫兹辐射主要归因于从分离带的跃迁。该结论提供了一种新颖的方法,可以有效地产生宽带和相干受控的太赫兹辐射,从而通过该机制导致太赫兹辐射的实际应用。

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