SUBFEMTOSECOND DELAY OF THE CUBIC NONLINEARITY OF GASEOUS MEDIA

Radiophysics and Quantum Electronics 2026

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Authors: N. R. Vrublevskaya, Daniil E. Shipilo, I. A. Nikolaeva, Dmitrii V. Pushkarev, N. A. Khasiyatullov, Georgy E. Rizaev, Maximilian Levus, А. А. Ионин, Leonid V. Seleznev, O. G. Kosareva, N. A. Panov
DOI: 10.1007/s11141-026-10524-5
Cited by: 0
References: 18

Abstract

We establish the physical mechanism of the long-wavelength spectral shift during the propagation of an ultraviolet femtosecond pulse in gases using a numerical solution of the non-stationary Schrödinger equation. It is shown that the source of long-wavelength radiation is the leading edge of the pulse, where a cubic response delayed by approximately 100 as develops with a nearly zero phase shift between the polarization and the pump field. It was established that the long-wavelength shift of the spectrum arises due to the superposition of contributions from bound-bound and bound-free transitions.

Fields of Study & Subjects

Laser-Matter Interactions and Applications Photorefractive and Nonlinear Optics Photonic Crystal and Fiber Optics

Publication details

Journal / source
Radiophysics and Quantum Electronics
Volume
69
Issue
1
Pages
82–82
Publication date
1 January 2026
Language
EN