Bernerd Cyril, Segonds Patricia, Debray Jérôme, Notake Takashi, Koyama Mio, Minamide Hiroaki, Ito Hiromasa, Boulanger Benoît
Opt Lett. 2018 Apr 15;43(8):1818-1821. doi: 10.1364/OL.43.001818.
We performed the direct measurement of second harmonic generation and sum frequency generation phase-matching directions in the organic N-benzyl-2-methyl-4-nitroaniline crystal over its visible and near-infrared transparency range. The fit of these data allowed us to refine the Sellmeier equations of the three principal refractive indices in this range. With these equations, we improved the calculated tuning curves of terahertz emission from a phase-matched difference frequency process. We also determined the absolute magnitude of the d nonlinear coefficient.
我们在有机N-苄基-2-甲基-4-硝基苯胺晶体的可见和近红外透明范围内，对二次谐波产生和和频产生的相位匹配方向进行了直接测量。对这些数据的拟合使我们能够完善该范围内三个主折射率的Sellmeier方程。利用这些方程，我们改进了通过相位匹配差频过程产生太赫兹辐射的计算调谐曲线。我们还确定了d非线性系数的绝对值。
