Towards High-Repetition-Rate Intense Terahertz Source With Metal Wire-Based Plasma

Yuxin Leng,Dongdong Zhang,Yingying Ding,Yafeng Bai,Ruxin Li,Chuliang Zhou,Yushan Zeng,Liwei Song,Zhongpeng Li,Ye Tian

doi:10.1109/jphot.2022.3140872

Yuxin Leng, Dongdong Zhang + Show 8 more

Open Access

https://doi.org/10.1109/jphot.2022.3140872

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Abstract

Terahertz radiation can provide unprecedented vistas in physical studies such as transient matter state control and advanced free-electron manipulation. Here, we present one feasible path towards high-repetition-rate, intense THz sources by combining the wire-based THz source on a consecutively running, wire-conveying tape design. The proof-of-principle experimental results show an upper 30 mW average THz power output under 1 kHz laser excitation, which presents the first high-repetition-rate, and most importantly, portable and application in handy THz source that is generated by solid plasmas. The generated THz pulses are characterized with a 0.3 THz center frequency and ∼0.3 THz bandwidth. We believe this tabletop laser-driven high-repetition-rate THz source will open a new door for THz and related interdisciplinary sciences.

Highlights

I NTENSE terahertz (THz) radiation has attracted growing interest in the research area of low-frequency excitation dynamics
Our approach opens a new path for the steady operation of the solid plasma THz sources, which paves the way for high repetition rate intense THz pulses in further applications
To determine the emitted THz pulse energy, a Golay cell detector is placed at the emission edge of the wire conveying tape (WCT) with a lowpass filter (2 mm PTFE) applied to block the infrared scattered light

Summary

INTRODUCTION

I NTENSE terahertz (THz) radiation has attracted growing interest in the research area of low-frequency excitation dynamics. THz generation from laser-induced plasma involving solid, gas, and even liquid has received considerable attention owing to its damage-free nature [17] in air or liquid plasmas, where the interaction spots are constantly refreshed, highrepetition-rate (1 kHz) sources are obtained though being subject to a low energy conversion efficiency [18]–[22] None of these sources currently have been an average power output over 20 mW yet. Emitted THz synchrotron radiation does not rely on the laser-plasma interaction directly as in the case of foil target This new mechanism, together with its compact size and high energy conversion efficiency (∼1%), opens a new avenue for solid-plasma-based intense THz source [28]. Our approach opens a new path for the steady operation of the solid plasma THz sources, which paves the way for high repetition rate intense THz pulses in further applications

EXPERIMENT SETUP

RESULTS AND DISCUSSIONS

CONCLUSION