Highly efficient microwave emission from DC-biased femtosecond laser filament in air

Applied Physics Letters 2026

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Authors: A. A. Ushakov, N. R. Vrublevskaya, E. V. Mitina, D. S. Uryupina, P. A. Chizhov, Т.В. Долматов, V.V. Bulgakova, K. A. Galuyk, S. V. Garnov, N. A. Panov, A. B. Savel’ev
DOI: 10.1063/5.0336296
Cited by: 1
References: 35

Abstract

We report observation of microwave radiation from the femtosecond filament in air biased by 10-kV/cm static transverse field with an amplitude ∼ 2 orders of magnitude higher than in the unbiased or weakly biased cases. Such powerful microwaves with the broadband spectrum at least from 2 to 13 GHz propagate at relatively small angles with respect to the laser beam axis. We propose and justify the physical mechanism of microwave emission: the microwaves are generated by the external-field-induced transverse plasma current which decreases during 100–500 ps after the laser pulse due to the electron-ion recombination.

Fields of Study & Subjects

Laser-Matter Interactions and Applications Laser-Plasma Interactions and Diagnostics Laser Material Processing Techniques

Publication details

Journal / source
Applied Physics Letters
Publisher
AIP Publishing
Volume
129
Issue
2
Publication date
13 July 2026
Language
EN