论文标题
通过相匹配的光学整流锂在Niobate中生成0.7 MJ多环形辐射15 THz辐射
Generation of 0.7 mJ multicycle 15 THz radiation by phase-matched optical rectification in lithium niobate
论文作者
论文摘要
我们通过使用高能量（高达2 J）飞秒Ti：Sapphire激光脉冲，从大区域氯酸盐晶体中的14.6 THz展示了有效的多环形脉冲产生。这种Terahertz辐射是通过尼贝特锂中的相匹配的光学整流产生的。在实验上，我们达到了0.71 MJ的最大Terahertz能量，转化效率为$ \ sim $ 0.04％。我们还发现，最佳的Terahertz转化率的有效相互作用长度从根本上受到Terahertz吸收，通过材料分散剂的激光脉冲拉伸以及Terahertz诱导的非线性级联级联效应的限制。
We demonstrate efficient multicycle terahertz pulse generation at 14.6 THz from large-area lithium niobate crystals by using high-energy (up to 2 J) femtosecond Ti:sapphire laser pulses. Such terahertz radiation is produced by phase-matched optical rectification in lithium niobate. Experimentally, we achieve maximal terahertz energy of 0.71 mJ with conversion efficiency of $\sim$0.04%. We also find that the effective interaction length for optimal terahertz conversion is fundamentally limited by terahertz absorption, laser pulse stretching by material dispersion, and terahertz-induced nonlinear cascading effects on the driving laser pulse.
