Effects of surface roughness on reflection spectra obtained by terahertz time-domain spectroscopy
Effects of surface roughness on reflection spectra obtained by terahertz time-domain spectroscopy
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DOI：
10.1364/ol.31.003653
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发表时间：
2006-12-15
期刊：
影响因子：
3.6
通讯作者：
Osiander, Robert
中科院分区：
文献类型：
--
作者：
Dikmelik, Yamac;Spicer, James B.;Osiander, Robert
我们提出了一个分析模型，该模型表明粗糙表面的反射会导致太赫兹波的光谱幅度发生高斯频率滚降，并降低太赫兹时域光谱的信噪比。决定频率滚降宽度的参数是表面高度分布的标准偏差。对铜粉样品反射的太赫兹波的测量为这种效应提供了实验证据。 (c) 2006 年美国光学学会。
We present an analytical model that shows that reflection from a rough surface causes a Gaussian frequency roll-off for the spectral magnitude of a terahertz wave and reduces the signal-to-noise ratio of terahertz time-domain spectroscopy. The parameter that determines the width of the frequency roll-off is the standard deviation of the surface height distribution. Measurements of terahertz waves reflected from copper powder samples provide experimental evidence for this effect. (c) 2006 Optical Society of America.