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Radiation Dynamics and Manipulation of Extreme Terahertz Surface Wave on a Metal Wire
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2024-09-06 , DOI: 10.1002/lpor.202400954 Jianshuo Wang 1 , Zhijun Zhang 1 , Shiyi Zhou 1 , Zhiyong Qin 1 , Changhai Yu 1 , Yuteng Cao 1 , Yan Lv 1 , Jiaming Chen 1 , Huali Huang 1 , Weiwei Liu 2 , Jiansheng Liu 1
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2024-09-06 , DOI: 10.1002/lpor.202400954 Jianshuo Wang 1 , Zhijun Zhang 1 , Shiyi Zhou 1 , Zhiyong Qin 1 , Changhai Yu 1 , Yuteng Cao 1 , Yan Lv 1 , Jiaming Chen 1 , Huali Huang 1 , Weiwei Liu 2 , Jiansheng Liu 1
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Recent reports on sub‐terahertz (THz) generation from a laser‐irradiated wire might have evaded the most essential contents of the wire radiation dynamics. Here, the origin of terahertz generation from a metal wire is revisited and a comprehensive diagnosis of the terahertz radiation from a 100 µm‐diameter tungsten wire irradiated by an intense femtosecond laser is implemented. For the first time, the long‐neglected but more efficient high‐frequency terahertz radiation is experimentally observed of which the spectra, polarization, tunability, and wire‐length‐dependent intensification are investigated comprehensively. A new picture of the wire radiation dynamics is presented to reveal the origin of the extreme terahertz surface wave, its evolution, and radiation mechanism. This extremely intense and ultrashort half‐cycle surface wave is spontaneously induced by a laser‐driven transient charge‐separation field and evolves into a multi‐cycle surface wakefield structure as it propagates along the wire owing to the self‐interaction between the surface wave and its carrier, the surface current. By manipulating the coupling and transport dynamics of the surface wave on the wire, tunable and intensified THz radiation covering a wide range from 0.1 to 20 THz has been realized, paving the way for broad applications such as terahertz acceleration, bio‐medicine, nonlinear THz science and beyond.
中文翻译：
金属丝上极端太赫兹表面波的辐射动力学和操纵
最近关于激光照射线产生亚太赫兹（THz）的报告可能回避了线辐射动力学的最重要内容。在这里，重新审视了金属丝产生太赫兹的起源，并对强飞秒激光照射的 100 µm 直径钨丝产生的太赫兹辐射进行了全面诊断。首次通过实验观察到长期被忽视但更有效的高频太赫兹辐射，对其光谱、偏振、可调谐性和线长依赖性增强进行了全面研究。提出了线辐射动力学的新图像，揭示了极端太赫兹表面波的起源、演化和辐射机制。这种极强、超短的半周期表面波是由激光驱动的瞬态电荷分离场自发诱导的，并且由于表面波和表面波之间的自相互作用，当它沿导线传播时演变成多周期表面尾场结构。它的载体，表面电流。通过操纵导线上表面波的耦合和传输动力学，实现了覆盖0.1至20 THz宽范围的可调谐和增强太赫兹辐射，为太赫兹加速、生物医学、非线性太赫兹等广泛应用铺平了道路科学及其他。
更新日期：2024-09-06
中文翻译：
金属丝上极端太赫兹表面波的辐射动力学和操纵
最近关于激光照射线产生亚太赫兹（THz）的报告可能回避了线辐射动力学的最重要内容。在这里，重新审视了金属丝产生太赫兹的起源，并对强飞秒激光照射的 100 µm 直径钨丝产生的太赫兹辐射进行了全面诊断。首次通过实验观察到长期被忽视但更有效的高频太赫兹辐射，对其光谱、偏振、可调谐性和线长依赖性增强进行了全面研究。提出了线辐射动力学的新图像，揭示了极端太赫兹表面波的起源、演化和辐射机制。这种极强、超短的半周期表面波是由激光驱动的瞬态电荷分离场自发诱导的，并且由于表面波和表面波之间的自相互作用，当它沿导线传播时演变成多周期表面尾场结构。它的载体，表面电流。通过操纵导线上表面波的耦合和传输动力学，实现了覆盖0.1至20 THz宽范围的可调谐和增强太赫兹辐射，为太赫兹加速、生物医学、非线性太赫兹等广泛应用铺平了道路科学及其他。
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