Optimized terahertz-wave generation using BNA-DFG.
Optimized terahertz-wave generation using BNA-DFG.
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DOI：
10.1364/oe.17.014832
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发表时间：
2009-08
期刊：
影响因子：
3.8
通讯作者：
K. Miyamoto;S. Ohno;M. Fujiwara;H. Minamide;H. Hashimoto;Hiromasa Ito
中科院分区：
文献类型：
--
作者：
K. Miyamoto;S. Ohno;M. Fujiwara;H. Minamide;H. Hashimoto;Hiromasa Ito
通过优化泵浦波长，证明了一种在有机N-苄基-2-甲基-4-硝基苯胺(BNA)晶体中利用差频产生(DFG)产生太赫兹(THz)辐射的有效且可调谐的方法。我们计算了BNA的(宽带)折射率和相干长度映射，建立了DFG的最佳相位匹配条件。为了满足0.1-20太赫兹范围内的相位匹配条件，两个泵浦波长在780-950 nm之间变化，明显地观察到了太赫兹输出的光波长依赖性。我们扩大了太赫兹波的产生范围，并将功率输出提高到以前方法的十倍。
An effective and widely tunable means of producing terahertz (THz) radiation using difference-frequency generation (DFG) in an organic N-benzyl-2-methyl-4-nitroaniline (BNA) crystal was demonstrated by optimizing the pump wavelengths. We calculated the (wideband) refractive index and coherence length mapping of BNA to establish the optimum phase-matching condition of the DFG configuration. To satisfy the phase-matching conditions over the range 0.1-20 THz, both pump wavelengths were varied from 780 to 950 nm, and the optical wavelength dependency of the THz-wave output was clearly observed. We expanded the range of THz-wave generation and increased the power output to ten times that obtained using previous methods.