CAJ | 학술논문

激光诱导产生的空气等离子体作为太赫兹时域技术中的发射源和探测器，使涵盖整个太赫兹波段(0.1—10 THz)光谱测量成为可能，进一步加强了太赫兹时域技术在研究光和物质的相互作用时的重要作用。文章作者通过实验研究了从激光诱导的亚毫米量级等离子体(微型等离子体)中发射的太赫兹波，并发现这种技术可能大大降低基于等离子体的太赫兹技术所需的激光能量。另外，文中还介绍了其他和微型等离子体相关的未来研究方向，包括利用微型等离子体进行太赫兹探测的可能性。
격광유도산생적공기등리자체작위태혁자시역기술중적발사원화탐측기，사함개정개태혁자파단(0.1—10 THz)광보측량성위가능，진일보가강료태혁자시역기술재연구광화물질적상호작용시적중요작용。문장작자통과실험연구료종격광유도적아호미량급등리자체(미형등리자체)중발사적태혁자파，병발현저충기술가능대대강저기우등리자체적태혁자기술소수적격광능량。령외，문중환개소료기타화미형등리자체상관적미래연구방향，포괄이용미형등리자체진행태혁자탐측적가능성。
The integration of ambient air plasma as both source and sensor in terahertz (THz) time-domain technology allows spectral measurements covering the elusive gap from 0.1—10 THz, further increasing the impact of THz science as a tool in the study of the four states of matter. In this article we describe our experimental investigations on the THz emission from a laser induced plasma of submillimeter size. The main emission direction is almost orthogonal to the laser propagation direction, unlike that of elongated plasmas. We show that laser pulse ener-gies lower than 1μJ are sufficient to generate measurable THz pulses from ambient air. This sig-nificant decrease in the required laser energy will make plasma-based THz techniques more acces-sible to the scientific community. Methods to further optimize the method, as well as other rele-vant THz technology, such as using micro-plasma as a THz wave sensor, are also proposed.