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, A. Savel'ev

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

We individually control polarizations of 800 and 400 nm beams, which form a two-color femtosecond plasma filament in air irradiating a linear-to-elliptical THz signal. We detected a threshold-like appearance of THz ellipticity at the angle of ~85° between the fundamental and second-harmonic field polarization directions. The simulations confirm the abrupt change of THz polarization and reveal that the weak ellipticity of the second harmonic is sufficient to generate essentially elliptical THz radiation.

Original languageEnglish (US)
Pages (from-to)90-93
Number of pages4
JournalOptics Letters
Volume43
Issue number1
DOIs
StatePublished - Jan 1 2018

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