SPATIAL MODE CONTROL OF HIGH-ORDER HARMONICS

Citation
I. Mercer et al., SPATIAL MODE CONTROL OF HIGH-ORDER HARMONICS, Physical review letters, 77(9), 1996, pp. 1731-1734
Citations number
17
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
ISSN journal
0031-9007
Volume
77
Issue
9
Year of publication
1996
Pages
1731 - 1734
Database
ISI
SICI code
0031-9007(1996)77:9<1731:SMCOHH>2.0.ZU;2-R
Abstract
We demonstrate that the spatial mode of high-order harmonics can be co ntinuously controlled. The control is achieved by spatially modulating the degree of elliptical polarization of the fundamental field using birefringent optics. A highly sensitive relationship between the effic iency of harmonic generation and the degree of laser elliptical polari zation leads to atoms emitting harmonics mainly in regions of linear p olarization. The harmonics are emitted as annular beams whose angles o f divergence can be continuously varied.