Two-Color Laser-Ionization Injection

Control of strong-field ionization with two-color laser pulses

Strong-field ionization with two-color circularly polarized laser fields

Christopher A. Mancuso,1 Daniel D. Hickstein,1,* Patrik Grychtol,1 Ronny Knut,1 Ofer Kfir,2 Xiao-Min Tong,3 Franklin Dollar,1 Dmitriy Zusin,1 Maithreyi Gopalakrishnan,1 Christian Gentry,1 Emrah Turgut,1 Jennifer L. Ellis,1 Ming-Chang Chen,4 Avner Fleischer,2,5 Oren Cohen,2 Henry C. Kapteyn,1 and Margaret M. Murnane1 1JILA and Department of Physics, University of Colorado Boulder and NIST, Bould...

Observation of ionization enhancement in two-color circularly polarized laser fields

Christopher A. Mancuso,1 Kevin M. Dorney,1 Daniel D. Hickstein,1 Jan L. Chaloupka,2 Xiao-Min Tong,3 Jennifer L. Ellis,1 Henry C. Kapteyn,1 and Margaret M. Murnane1 1JILA, Department of Physics, University of Colorado Boulder and NIST, Boulder, Colorado 80309, USA 2Department of Physics and Astronomy, University of Northern Colorado, Greeley, Colorado 80639, USA 3Center for Computational Science...

Controlling Nonsequential Double Ionization in Two-Color Circularly Polarized Femtosecond Laser Fields.

Atoms undergoing strong-field ionization in two-color circularly polarized femtosecond laser fields exhibit unique two-dimensional photoelectron trajectories and can emit bright circularly polarized extreme ultraviolet and soft-x-ray beams. In this Letter, we present the first experimental observation of nonsequential double ionization in these tailored laser fields. Moreover, we can enhance or...

Nonsequential Double Ionization by Counterrotating Circularly Polarized Two-Color Laser Fields.

We report on nonsequential double ionization of Ar by a laser pulse consisting of two counterrotating circularly polarized fields (390 and 780 nm). The double-ionization probability depends strongly on the relative intensity of the two fields and shows a kneelike structure as a function of intensity. We conclude that double ionization is driven by a beam of nearly monoenergetic recolliding elec...