Experimental study of photodetachment in a strong laser field of circular polarization

Negative fluorine ions are exposed to a circularly polarized infrared laser pulse with a peak intensity on the order of 2.6 x 10(13) W/cm(2). A fundamental difference, as compared to the case of linearly polarized field, is found in the absence of any structure in the photoelectron spectrum that can...

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Bibliographic Details
Published in:Physical review letters 2005-12, Vol.95 (26), p.263002.1-263002.4, Article 263002
Main Authors: BERGUES, Boris, YONGFENG NI, HELM, Hanspeter, KIYAN, Igor Yu
Format: Article
Language:English
Subjects:
ANIONS
APPROXIMATIONS
Atomic and molecular physics
Atomic properties and interactions with photons
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
ELECTRON DETACHMENT
Exact sciences and technology
FLUORINE IONS
INTERFERENCE
LASER RADIATION
Multiphoton ionization and excitation to highly excited states (e.g., rydberg states)
Photodetachment of atomic negative ions
PHOTOELECTRON SPECTROSCOPY
Photon interactions with atoms
PHOTON-ATOM COLLISIONS
Physics
POLARIZATION
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Summary:Negative fluorine ions are exposed to a circularly polarized infrared laser pulse with a peak intensity on the order of 2.6 x 10(13) W/cm(2). A fundamental difference, as compared to the case of linearly polarized field, is found in the absence of any structure in the photoelectron spectrum that can be associated with the quantum interference effect. This observation is in accord with our recent predictions [S. Beiser, Phys. Rev. A 70, 011402 (2004)10.1103/Phys. Rev. A.70. 011402]. The experiment reveals that the length gauge is appropriate for the description of the field interaction in the frame of the strong field approximation.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.95.263002