论文标题
有效地产生了石英的强烈宽带Terahertz脉冲
Efficient Generation of Intense Broadband Terahertz Pulses from Quartz
论文作者
论文摘要
强烈的Terahertz（THZ）脉冲有助于观察各种非线性光学效应和对材料特性的操纵。在这项工作中，我们报告了一种方便的方法，可以产生强大的宽带Terahertz脉冲，中心频率可在2-4 THz之间进行调节。脉冲能量为1.2 microjoule的相干THZ光源可以是由通过超短倾斜波脉冲泵送的低成本晶体石英产生的。由于宽阔的光谱窗口和高损伤阈值，我们的理论分析和实验表明，石英中的光学整流与Linbo3中的光学疗效高，但涵盖了更广泛的光谱范围。这项工作不仅提供了超过1 THz的非线性THZ光谱迫切需要的光源，而且还提供了选择非线性光学晶体以用于光学频率转换的替代路线。
The intense terahertz (THz) pulses facilitate the observation of various nonlinear optical effects and manipulation of material properties. In this work, we report a convenient approach that can produce strong broadband terahertz pulses with center frequency tunable between 2-4 THz. The coherent THz light source with pulse energy of 1.2 microjoule can be generated from a low-cost crystalline quartz pumped by an ultrashort tilted wave-front pulse. Thanks to the wide transparent spectral window and high damage threshold, our theoretical analysis and experiment show that the optical rectification in quartz is as efficient as that in LiNbO3, but covers much broader spectral range. This work not only provides the light source that is urgently needed for nonlinear THz spectroscopy beyond 1 THz, but offers an alternative route in the selection of nonlinear optical crystals for optical frequency conversion.
