A cross-correlation spectroscopy in subterahertz region using an incoherent light source
A cross-correlation spectroscopy in subterahertz region using an incoherent light source
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DOI：
10.1063/1.126082
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发表时间：
2000-03-20
影响因子：
4
通讯作者：
Hangyo, M
中科院分区：
文献类型：
--
作者：
Morikawa, O;Tonouchi, M;Hangyo, M
提出了一种采用多模激光二极管和光导天线的亚太赫兹（sub-THz）光谱系统。它利用光强度的随机波动来产生来自发射器PA的亚太赫兹辐射，并触发探测器PA。该信号以亚太赫兹辐射幅值与激光光强的相互关系得到。由于样品传输引起的辐射幅度和相位延迟的减少可以从亚太赫兹广谱区域的信号中计算出来。该系统应用于硅片复折射率的测量。所得的折射率色散可以用德鲁德模型很好地解释。(C) 2000年美国物理研究所。[s0003 - 6951(00) 04012 - 2]。
A subterahertz (sub-THz) spectroscopic system using a multimode laser diode and photoconductive antennas (PA) has been proposed. It employs a random fluctuation of the light intensity to produce the subterahertz radiation from the emitter PA and also to trigger the detector PA. The signal is obtained as the cross correlation between the sub-THz radiation amplitude and laser light intensity. The decrease in the amplitude and phase delay of the radiation due to transmission from a sample can be calculated from the signal in a broad spectral region of sub-THz. This system is applied to the measurement of the complex refractive indices of Si wafers. The obtained dispersion of the refractive indices is well explained by the Drude model. (C) 2000 American Institute of Physics. [S0003-6951(00)04012-2].