Enhancement of laser interaction with vacuum for a large angular aperture.
Phys Rev Lett
; 107(7): 073602, 2011 Aug 12.
Article
em En
| MEDLINE
| ID: mdl-21902393
ABSTRACT
We study the nonlinear interaction of laser light with vacuum for a large angular aperture at electromagnetic field strengths far below the Schwinger limit. The polarization and magnetization in vacuum irradiated by a focused laser beam clearly differ from those in matter. This is due to the dependence on the Lorentz invariant, which results in a ring-shaped radiation distribution in vacuum. The number of the radiated photons increases nonlinearly with increasing angular aperture.
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En
Ano de publicação:
2011
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Article