Exchange and polarization effect in high-order harmonic imaging of molecular structures

Journal Article · Fri Oct 15 04:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.043414· OSTI ID:21450806

Sukiasyan, Suren; Ivanov, Misha Yu ^[1]; Patchkovskii, Serguei ^[2]; Smirnova, Olga ^[3]; Brabec, Thomas ^[4]

---

1. Department of Physics, Imperial College London, South Kensington Campus, SW7 2AZ London (United Kingdom)
2. National Research Council, 100 Sussex Drive, Ottawa, Ontario K1A 0R6 (Canada)
3. Max-Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, Max-Born-Strasse 2A, D-12489 Berlin (Germany)
4. Physics Department and Center for Research in Photonics, University of Ottawa, 150 Louis Pasteur, Ottawa, Ontario K1N 6N5 (Canada)

We analyze the importance of exchange, polarization, and electron-electron correlation in high-order harmonic generation in molecules interacting with intense laser fields. We find that electron exchange can become particularly important for harmonic emission associated with intermediate excitations in the molecular ion. In particular, for orbitals associated with two-hole one-particle excitations, exchange effects can eliminate structure-related minima and maxima in the harmonic spectra. Laser-induced polarization of the neutral molecule may also have major effects on orbital structure-related minima and maxima in the harmonic spectra. Finally, we show how exchange terms in recombination can be viewed as a shakedownlike process induced by sudden electronic excitation in the ion.

• OSTI ID: 21450806
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 4 Vol. 82; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
CHARGED PARTICLES
COLLISIONS
CORRELATIONS
ELECTROMAGNETIC RADIATION
ELECTRON CORRELATION
ELECTRON EXCHANGE
ELECTRON TRANSFER
ELECTRONS
ELEMENTARY PARTICLES
EMISSION
ENERGY SPECTRA
ENERGY-LEVEL TRANSITIONS
EXCITATION
FERMIONS
FREQUENCY MIXING
HARMONIC GENERATION
HOLES
IONS
LASER RADIATION
LEPTONS
MOLECULAR IONS
MOLECULAR STRUCTURE
MOLECULE COLLISIONS
MOLECULES
PHOTON COLLISIONS
PHOTON EMISSION
PHOTON-MOLECULE COLLISIONS
POLARIZATION
RADIATIONS
RECOMBINATION
SPECTRA