Quantum-Mechanical Description of Ionization-Induced Generation of Tunable Mid-Infrared Pulses

25th Annual International Laser Physics Workshop

Silaev, A.A.^1,2 ; Romanov, A.A.^1,2 ; Kostin, V.A.^1,2 ; Vvedenskii, N.V.^1,2

Institute of Applied Physics, Nizhny Novgorod

603950, Russia^1

Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod

603950, Russia^2

关键词: Analytical formulas;    Analytical studies;    Low-frequency currents;    Mid-infrared pulse;    Multiphoton ionization;    Quantum mechanical;    Strong-field approximations;    Two-color laser pulse;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/826/1/012014/pdf
DOI  :  10.1088/1742-6596/826/1/012014

来源: IOP

【 摘 要 】

The work is devoted to the analytical study of the excitation of low-frequency current density (with frequencies much smaller than the frequency of the optical wave) which radiates in mid-infrared band in the gas ionization by two-color laser pulses. We calculate the low-frequency current density using the analytical solution of time-dependent Schrödinger equation on the basis of strong-field approximation. Closed-form analytical formulas for the low-frequency current density are obtained for laser-pulse parameters corresponding the tunneling and multiphoton ionization regimes. The features of excitation of low-frequency current density are analyzed in both regimes.