Document Detail

Coherent focusing of high harmonics: a new way towards the extreme intensities.
MedLine Citation:
PMID:  15783488     Owner:  NLM     Status:  PubMed-not-MEDLINE    
We demonstrate analytically and numerically that focusing of high harmonics produced by the reflection of a few-femtosecond laser pulse from a concave plasma surface opens a new way to unprecedentally high intensities. The key features allowing the boosting of the focal intensity are the harmonics coherency and the small exponent of the power-law decay of the harmonics spectrum. Using similarity theory and direct particle-in-cell simulations, we find that the intensity at the focus scales as I(CHF) alpha a(3)(0)I(0), where a(0) and I(0) alpha a(2)(0) are the dimensionless relativistic amplitude and the intensity of the incident laser pulse. The scaling suggests that due to the coherent harmonic focusing (CHF), the Schwinger intensity limit can be reached using lasers with I(0) approximately 10(22) W/cm(2). The pulse duration at the focus scales as tau(CHF) alpha 1/a(2)(0) and reaches the subattosecond range.
S Gordienko; A Pukhov; O Shorokhov; T Baeva
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Publication Detail:
Type:  Journal Article     Date:  2005-03-18
Journal Detail:
Title:  Physical review letters     Volume:  94     ISSN:  0031-9007     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2005 Mar 
Date Detail:
Created Date:  2005-03-23     Completed Date:  2005-06-07     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  103903     Citation Subset:  -    
Institut für Theoretische Physik I, Heinrich-Heine-Universität Düsseldorf, Düsseldorf D-40225, Germany.
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