Abstract

The plasma filament induced by photo-ionization in transparent media (e.g., air) is a competitive terahertz (THz) source, whose mechanism has been widely studied in two separate schemes, i.e., the one- or two-color femtosecond laser filamentation. However, the physical commonality of these two schemes is less explored currently, and a common theory is in urgent need. Here, we proposed the traveling-wave antenna (TWA) model applicable to both single- and dual-color laser fields, which successfully reproduced the reported far-field THz angular distribution/dispersion from different filament lengths with either a constant or a varied plasma density. This work paves the way toward a deeper understanding of the important laser-filament-based THz sources within the same theoretical framework.

© 2023 Optica Publishing Group

Conical versus Gaussian terahertz emission from two-color laser-induced air plasma filaments

Christian Buhl Sørensen, Léo Guiramand, Jérôme Degert, Marc Tondusson, Esben Skovsen, Eric Freysz, and Emmanuel Abraham
Opt. Lett. 45(7) 2132-2135 (2020)

Terahertz emission pattern from a single-color filament plasma

Georgy E. Rizaev, Leonid V. Seleznev, Daria V. Mokrousova, Dmitrii V. Pushkarev, and Andrey A. Ionin
Opt. Lett. 47(22) 5917-5920 (2022)

Coherent generation and control of tunable narrowband THz radiation from a laser-induced air-plasma filament

Xiaoyue Zhou, Yuchen Lin, Yi Chan, Fu Deng, and Jingdi Zhang
Opt. Lett. 48(11) 2881-2884 (2023)

Polarization control of terahertz radiation from two-color femtosecond gas breakdown plasma

O. Kosareva, M. Esaulkov, N. Panov, V. Andreeva, D. Shipilo, P. Solyankin, A. Demircan, I. Babushkin, V. Makarov, U. Morgner, A. Shkurinov, and A. Savel’ev
Opt. Lett. 43(1) 90-93 (2018)

Spectral control of terahertz radiation from inhomogeneous plasma filaments by tailoring two-color laser beams

Wang Sheng, Fu Tang, Zhelin Zhang, Yanping Chen, Xiao-Yu Peng, and Zheng-Ming Sheng
Opt. Express 29(6) 8676-8684 (2021)