论文标题
从激光诱导的空气丝中对可调窄带THZ辐射的相干产生和控制
Coherent generation and control of tunable narrowband THz radiation from laser-induced air-plasma filament
论文作者
论文摘要
我们报告了基本证明实验，该实验是从空气延伸的两色激光脉冲序列的节拍中规定的空气丝丝（THZ）辐射产生载体 - 可控和可频率可触发的窄带Terahertz（THz）辐射。通过通过光栅担架传播基本的超快激光脉冲来制备脉冲序列，并具有可变的臂间延迟。通过部分频率加倍并集中脉冲序列，创建了一个骑行音符的空气 - 浮雕灯丝，以在连贯的控制下辐射具有主要脉冲特性（中心频率和CEP）的Thz波。为了再现实验结果并阐明复杂的非线性光 - 摩擦相互作用，已经进行了数值模拟。这项工作证明了在激光诱导的空气等离子体中产生相干控制的窄带THZ波的可行性。
We report on the proof-of-principle experiment of generating carrier-envelope phase (CEP)-controllable and frequency-tunable narrowband terahertz (THz) radiation from air-plasma filament prescribed by the beat of temporally stretched two-color laser pulse sequence. The pulse sequence was prepared by propagating the fundamental ultrafast laser pulse through a grating stretcher and Michelson interferometer with variable inter-arm delay. By partially frequency-doubling and focusing the pulse sequence, an air-plasma filament riding a beat note was created to radiate THz wave with primary pulse characteristics (center frequency and CEP) under coherent control. To reproduce experimental results and elucidate complex nonlinear light-matter interaction, numerical simulation has been performed. This work demonstrates the feasibility of generating coherently controlled narrowband THz wave with high tunability in laser-induced air plasma.
