There was no appropriate antireflection coating material for organic nonlinear optical (NLO) crystal used for terahertz wave generation; therefore, it was difficult to reduce Fresnel’s reflection loss of laser power used to excite the emitter crystal until we found that an amorphous polymer “Cytop” was applicable. Here, we demonstrate enhanced terahertz (THz) wave generation from an organic NLO crystal using a coating made from Cytop. With the Cytop coating, surface reflection losses of the excitation light were minimized, resulting in a significant improvement in THz wave generation over a wide frequency range.

中文翻译：

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Cytop抗反射涂层DAST晶体增强了太赫兹波的产生

没有用于产生太赫兹波的有机非线性光学（NLO）晶体的合适的减反射涂层材料。因此，在发现无定形聚合物“ Cytop”适用之前，很难降低菲涅耳用于激发发射极晶体的激光功率的反射损失。在这里，我们展示了使用Cytop制成的涂层从有机NLO晶体产生的太赫兹（THz）波的增强效果。使用Cytop涂层，可以将激发光的表面反射损失降至最低，从而在较宽的频率范围内显着改善了THz波的产生。