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Transient absorption of attosecond pulse trains by laser-dressed helium |
Optics Letters, Vol. 37, Issue 12, pp. 2211-2213 (2012)
http://dx.doi.org/10.1364/OL.37.002211
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Abstract
We investigate transient absorption of high harmonics in an attosecond pulse train by laser-dressed He atoms using both single-atom and macroscopic methods. Calculations of the absorption as a function of laser wavelength and intensity reveal that the absorption probability is tied to resonant laser-dressed atomic states. We report for the first time to our knowledge a quarter-laser-cycle modulation in the absorption (mixed with the well-known half-cycle modulation). We discuss the conditions for which this high-order coupling could be observed and the role that the reshaping of the attosecond pulses in the medium plays in the timing of absorption.
© 2012 Optical Society of America
OCIS Codes
(020.4180) Atomic and molecular physics : Multiphoton processes
(320.7110) Ultrafast optics : Ultrafast nonlinear optics
(020.2649) Atomic and molecular physics : Strong field laser physics
ToC Category:
Ultrafast Optics
History
Original Manuscript: March 16, 2012
Revised Manuscript: April 12, 2012
Manuscript Accepted: April 16, 2012
Published: June 4, 2012
Citation
Shaohao Chen, Kenneth J. Schafer, and Mette B. Gaarde, "Transient absorption of attosecond pulse trains by laser-dressed helium," Opt. Lett. 37, 2211-2213 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-12-2211
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