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Title: Origin of Anomalous Spectra of Dynamic Alignments Observed in N{sub 2} and O{sub 2}

Abstract

Recent pump-probe experiments with intense femtosecond laser pulses and diatomic molecules N{sub 2} and O{sub 2}, have revealed the presence of Raman-forbidden anomalous series and lines in the Fourier spectrum of HHG (high harmonic generation) signals. A theoretical analysis of the problem is made by deriving a general expression of the angle dependent HHG operator that governs the dynamic alignment signals in linear molecules, and applying them to the experiments in N{sub 2} and O{sub 2}. A unified interpretation of the origin of the observed Raman-allowed and the anomalous spectral features is given. The results are also used to estimate the molecular temperature in the experiments.

Authors:
 [1];  [2];  [1]; ;  [3]
  1. Fakultaet fuer Physik, Universitaet Bielefeld, Postfach 100131, D-33501 Bielefeld (Germany)
  2. (United States)
  3. Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto 611-0011 (Japan)
Publication Date:
OSTI Identifier:
20951207
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 98; Journal Issue: 14; Other Information: DOI: 10.1103/PhysRevLett.98.143001; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; HARMONIC GENERATION; LASERS; MOLECULES; NITROGEN; OXYGEN; PULSES; SIGNALS

Citation Formats

Faisal, F. H. M., ITAMP, Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, Massachusetts 02138, Abdurrouf, A., Miyazaki, K., and Miyaji, G.. Origin of Anomalous Spectra of Dynamic Alignments Observed in N{sub 2} and O{sub 2}. United States: N. p., 2007. Web. doi:10.1103/PHYSREVLETT.98.143001.
Faisal, F. H. M., ITAMP, Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, Massachusetts 02138, Abdurrouf, A., Miyazaki, K., & Miyaji, G.. Origin of Anomalous Spectra of Dynamic Alignments Observed in N{sub 2} and O{sub 2}. United States. doi:10.1103/PHYSREVLETT.98.143001.
Faisal, F. H. M., ITAMP, Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, Massachusetts 02138, Abdurrouf, A., Miyazaki, K., and Miyaji, G.. Fri . "Origin of Anomalous Spectra of Dynamic Alignments Observed in N{sub 2} and O{sub 2}". United States. doi:10.1103/PHYSREVLETT.98.143001.
@article{osti_20951207,
title = {Origin of Anomalous Spectra of Dynamic Alignments Observed in N{sub 2} and O{sub 2}},
author = {Faisal, F. H. M. and ITAMP, Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, Massachusetts 02138 and Abdurrouf, A. and Miyazaki, K. and Miyaji, G.},
abstractNote = {Recent pump-probe experiments with intense femtosecond laser pulses and diatomic molecules N{sub 2} and O{sub 2}, have revealed the presence of Raman-forbidden anomalous series and lines in the Fourier spectrum of HHG (high harmonic generation) signals. A theoretical analysis of the problem is made by deriving a general expression of the angle dependent HHG operator that governs the dynamic alignment signals in linear molecules, and applying them to the experiments in N{sub 2} and O{sub 2}. A unified interpretation of the origin of the observed Raman-allowed and the anomalous spectral features is given. The results are also used to estimate the molecular temperature in the experiments.},
doi = {10.1103/PHYSREVLETT.98.143001},
journal = {Physical Review Letters},
number = 14,
volume = 98,
place = {United States},
year = {Fri Apr 06 00:00:00 EDT 2007},
month = {Fri Apr 06 00:00:00 EDT 2007}
}