Enhancement of valley-selective excitation by a linearly polarized two-color laser pulse

Numerical Simulation of an Intense Isolated Attosecond Pulse by a Chirped Two-Color Laser Field

We investigate theoretically the high-order harmonic spectrum extension and numerical generation of an intense isolated attosecond pulse from He+ ion irradiated by a two-color laser field. Our simulation results show that the chirp of the fundamental field can control HHG cutoff position. Also, these results show that the envelope forms of two fields are important factors for controlling the re...

Selective suppression of two-photon fluorescence in laser scanning microscopy by ultrafast pulse-train excitation.

Selective excitation of a particular fluorophore in the presence of others demands clever design of the optical field interacting with the molecules. We describe the use of 20- to 50-GHz pulse-train excitation leading to two-photon absorption, followed by successive one-photon stimulated emission as a potential technique in the context of controlling two-photon molecular fluorescence, with appl...

Selective two-photon fluorescence suppression by ultrafast pulse-pair excitation: control by selective one-color stimulated emission.

Controlling two-photon molecular fluorescence leading to selective fluorophore excitation has been a long sought after goal in fluorescence microscopy. In this letter, we thoroughly explore selective fluorescence suppression through simultaneous two-photon absorption by two different fluorophores followed by selective one-photon stimulated emission for one particular fluorophore. We achieve thi...

Spontaneous emergence of non-planar electron orbits during direct laser acceleration by a linearly polarized laser pulse

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...