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Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−
06:53

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Published on: July 27, 2018

Imaging the Kramers-Henneberger atom.

Felipe Morales1, Maria Richter, Serguei Patchkovskii

  • 1Max-Born Institute for Nonlinear Optics, Max-Born-Strasse 2A, D-12489 Berlin, Germany.

Proceedings of the National Academy of Sciences of the United States of America
|September 21, 2011
PubMed
Summary

Intense laser fields can surprisingly stabilize atoms, contrary to expectations of immediate ionization. This study visualizes these "laser-dressed" atoms, revealing insights into electron dynamics and strong-field processes.

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Area of Science:

  • Atomic and Molecular Physics
  • Nonlinear Optics
  • Quantum Electrodynamics

Background:

  • High-intensity laser pulses are crucial tools in various scientific applications.
  • Intense laser fields are expected to cause rapid ionization of atoms and molecules.
  • Recent experiments show neutral atoms remaining stable in intense laser fields, challenging this expectation.

Purpose of the Study:

  • To investigate the electronic structure of atoms stabilized in intense laser fields.
  • To demonstrate a method for imaging these "laser-dressed" atoms.
  • To explore the implications for understanding strong-field physics and laser-matter interactions.

Main Methods:

  • Utilizing photoelectron spectroscopy to probe the electronic structure.
  • Exposing neutral atoms to very intense infrared (IR) laser pulses.
  • Analyzing the stability and electronic configuration of atoms under extreme field conditions.

Main Results:

  • Direct imaging of the electronic structure of stable "laser-dressed" atoms was achieved.
  • Demonstrated that a significant fraction of atoms can resist ionization in intense laser fields.
  • Provided experimental evidence for the concept of laser-induced atomic stabilization.

Conclusions:

  • The electronic structure of laser-dressed atoms can be directly visualized.
  • This opens avenues for controlling bound electron dynamics in strong laser fields.
  • Findings contribute to a deeper understanding of high-order nonlinearities and laser filamentation.