Broadband terahertz wave emission from liquid metal
Broadband terahertz wave emission from liquid metal
复制标题
DOI：
10.1063/5.0015507
复制
发表时间：
2020-07-27
影响因子：
4
通讯作者：
Zhang, X. -C.
中科院分区：
文献类型：
--
作者：
Cao, Yuqi;E, Yiwen;Zhang, X. -C.
金属作为太赫兹源已经研究了几十年。最近的研究表明，金属在强激光脉冲激发下具有产生极高太赫兹脉冲能量的潜力。为了避免激光脉冲引起的金属表面碎片，在这里，我们报告了由亚皮秒激光脉冲激发的流动液态金属线的宽带太赫兹波发射的结果。在相同的光激发条件下，从液镓线发射的太赫兹信号比从水发射的信号表现出更强的场和更宽的带宽。我们的初步研究表明，液态金属有潜力作为高重复率强激光的有效和强大的太赫兹源。
Metals have been studied as terahertz sources for decades. Recent research has shown the potential of metals in generating extremely high THz pulse energy excited by intense laser pulses. To avoid the metal surface debris caused by laser pulses, here, we report the results of the broadband terahertz wave emission from a flowing liquid metal line excited by subpicosecond laser pulses. The THz signal emitted from the liquid gallium line shows the stronger field with the broader bandwidth compared to the signal from water under the identical optical excitation conditions. Our preliminary study suggests that the liquid metals have the potential to serve as efficient and powerful THz sources for the intense lasers with a high repetition rate.