Spectrum to space transformed fast terahertz imaging
Spectrum to space transformed fast terahertz imaging
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DOI：
10.1364/oe.20.019200
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发表时间：
2012-08-13
期刊：
影响因子：
3.8
通讯作者：
Koch, Martin
中科院分区：
文献类型：
--
作者：
Schumann, Steffen;Jansen, Christian;Koch, Martin
提出了一种将太赫兹（THz）脉冲的宽带频率信息转化为空间分辨率的成像技术。有效的闪耀衍射光栅传播的各个频率分量在一个广泛的和定义的空间范围和f-theta光学聚焦到一个一维的图像线上的各个组件。测量太赫兹波的时域波形因此允许空间样本特性的直接重建，因为空间域信息被编码在太赫兹频谱中。我们将在选定的样品上展示太赫兹成像，其采集速度提高了两个数量级。(C)2012美国光学学会
We present an imaging technique in which the broadband frequency information of terahertz (THz) pulses is transformed into spatial resolution. Efficient blazed diffractive gratings spread the individual frequency components over a wide and defined spatial range and f-theta optics are employed to focus the individual components onto a one-dimensional image-line. Measuring the time domain waveform of the THz waves allows therefore for a direct reconstruction of spatial sample characteristics as the spatial domain information is encoded in the terahertz spectrum. We will demonstrate terahertz imaging on selected samples with an improvement in acquisition speed up to two orders of magnitude. (C) 2012 Optical Society of America