Static-electric-field effects on high harmonic generation

Authors

Min-Qi Bao, Institute for Theoretical Atomic and Molecular Physics, Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts
Anthony F. Starace, University of Nebraska-LincolnFollow

Date of this Version

June 1996

Comments

Published by American Physical Society. Phys. Rev. A 53, R3723 (1996). http://pra.aps.org. Copyright © 1996 American Physical Society. Permission to use.

Abstract

High harmonic generation in the presence of a static electric field is analyzed theoretically by an extension of the zero-range potential model treatment of Becker et al [Phys. Rev. A 50, 1540 (1994)]. For H- and a CO₂ laser of 5 × 10¹⁰ W/cm² intensity, a static electric field of 100 kV/cm is shown to produce a plateau from the 3rd to the 23rd harmonic in which neighboring even and odd harmonics are of comparable intensity. Furthermore, odd harmonics on the plateau are one or more orders of magnitude more intense than in the absence of the static electric field. Dependence of emission rates on laser intensity and results for harmonic generation by Ar are also presented.