Ultra wide-band (1-100THz), quasi-CW monochromatic THz-wave source system

我们报道了通过优化抽运波长，在有机4-二甲氨基-N-甲基-4-二苯乙烯(DAST)中利用差频产生(DFG)产生有效且可调谐的太赫兹(THz)波。计算了超宽带DAST-DFG THz波产生的0类位相匹配条件。为了满足整个太赫兹波区的相位匹配条件，分别控制了两个泵浦波长。通过计算结果与实验结果的比较，确定了DAST-DFG的最佳相位匹配条件。

We report on the demonstration of an effective and widely tunable terahertz (THz)-wave generation using difference frequency generation (DFG) in an organic 4-dimethylamino-N-methyl-4-stilbazolium tosylate (DAST) by optimization of the pumping wavelength. We calculated the Type 0 phase-matching condition of DAST-DFG THz-wave generation over an ultrawide band. To satisfy phase-matching conditions over the whole THz-wave region, two pump wavelengths were controlled independently. A comparison of the calculated and experimental results established the optimum phase-matching condition of DAST-DFG.