Generation of Few- and Subcycle Radiation in Midinfrared-to-Deep-Ultraviolet Range During Plasma Production by Multicolor Femtosecond Pulses

V. A. Kostin and N. V. Vvedenskii

Phys. Rev. Lett. 120, 065002 – Published 8 February 2018

Abstract

Our closed-form analytical formulas and numerical calculations show that the plasma production by a two-color (or, more generally, multicolor) femtosecond pulse leads to generation of strong few- and subcycle radiation. The spectral composition of the radiation is defined by the numerous combination frequencies of the ionizing pulse. The radiation duration is equal to the ionization duration, which is much shorter than the multicolor pump. The phenomenon opens a new direct (without additional compression) way to create tunable sources of extremely short pulses with smooth envelopes and spectra in a broad range stretching from the midinfrared to the deep ultraviolet.

Received 21 September 2017

DOI:https://doi.org/10.1103/PhysRevLett.120.065002

Physics Subject Headings (PhySH)

Laser-plasma interactions Nonlinear optics Radiation & particle generation in plasmas Ultrafast phenomena

Plasma PhysicsNonlinear DynamicsAtomic, Molecular & Optical

Authors & Affiliations

V. A. Kostin^1,2 and N. V. Vvedenskii^1,2,*

¹Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod 603950, Russia
²University of Nizhny Novgorod, Nizhny Novgorod 603950, Russia