Single-shot terahertz time-domain spectroscopy in pulsed high magnetic fields
Single-shot terahertz time-domain spectroscopy in pulsed high magnetic fields
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DOI：
10.1364/oe.24.030328
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发表时间：
2016-12-26
期刊：
影响因子：
3.8
通讯作者：
Kono, Junichiro
中科院分区：
文献类型：
--
作者：
Noe, G. Timothy, II;Katayama, Ikufumi;Kono, Junichiro
我们研制了一台单次太赫兹时域光谱仪，用于在高达30 T的脉冲强磁场中进行光泵/太赫兹探测实验。用于测量太赫兹波形的单次检测方案结合了反射梯队，以在ZnTe检测晶体中与太赫兹辐射在空间和时间上重叠之前在光门光束的强度分布上创建时间延迟的子光束。在将门光束成像到相机上之后，我们可以通过分析所得图像来检索太赫兹时域波形。为了证明我们的技术的实用性，我们测量了回旋共振吸收的光激发载流子在太赫兹频率范围内的本征硅在高磁场，结果与公布的值吻合得很好。(C)2016美国光学学会
We have developed a single-shot terahertz time-domain spectrometer to perform optical-pump/terahertz-probe experiments in pulsed, high magnetic fields up to 30T. The single-shot detection scheme for measuring a terahertz waveform incorporates a reflective echelon to create time-delayed beamlets across the intensity profile of the optical gate beam before it spatially and temporally overlaps with the terahertz radiation in a ZnTe detection crystal. After imaging the gate beam onto a camera, we can retrieve the terahertz time-domain waveform by analyzing the resulting image. To demonstrate the utility of our technique, we measured cyclotron resonance absorption of optically excited carriers in the terahertz frequency range in intrinsic silicon at high magnetic fields, with results that agree well with published values. (C) 2016 Optical Society of America