论文标题
Terahertz波产生的流动低温液体靶
Flowing cryogenic liquid target for terahertz wave generation
论文作者
论文摘要
强烈的激光脉冲激发的凝结物质发射的Terahertz波发射不仅反映了激光 - 物质相互作用中的细节，而且还提供了明亮的Terahertz波源。流动的液体目标具有为每个激光脉冲提供新的区域的优势。为了在激光激发下证明无碎屑靶标，我们研究了液氮作为靶标的使用。通过在环境环境中创建流动的液氮线，我们成功地观察了宽带Terahertz波发射在短脉冲激发下。我们的低温线能够维持高重复率（1 kHz）激光的激发。从液氮发出的Terahertz峰场与液态水相当，但观察到更广泛的带宽。这项演示促使了选择潜在的材料来研究Terahertz波的产生过程以及理解不同液体中激光诱导的电离的潜在材料。
Terahertz wave emission from condensed matter excited by intense laser pulses not only reflects the details in laser-matter interaction but also offers bright terahertz wave sources. Flowing liquid targets possess the advantage of providing a fresh area for each laser pulse. To demonstrate a debris-free target under laser excitation, we investigate the use of liquid nitrogen as a target. By creating a flowing liquid nitrogen line in the ambient environment, we successfully observe broadband terahertz wave emission under short pulse excitation. Our cryogenic line is able to sustain the excitation of a high-repetition-rate (1 kHz) laser. The terahertz peak field emitted from liquid nitrogen is comparable to that from liquid water, yet a broader bandwidth is observed. This demonstration prompts new opportunities in choosing potential materials for studying terahertz wave generation process and in understanding laser-induced ionization in different liquids.
