SPATIAL EFFECTS OF RADIATION TRAPPING IN AN OPTICALLY THICK ATOMIC VAPOR EXCITED BY A LASER-BEAM

Citation
T. Scholz et al., SPATIAL EFFECTS OF RADIATION TRAPPING IN AN OPTICALLY THICK ATOMIC VAPOR EXCITED BY A LASER-BEAM, Physical review. A, 53(4), 1996, pp. 2169-2172
Citations number
22
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
ISSN journal
1050-2947
Volume
53
Issue
4
Year of publication
1996
Pages
2169 - 2172
Database
ISI
SICI code
1050-2947(1996)53:4<2169:SEORTI>2.0.ZU;2-Z
Abstract
We describe the influence of radiation trapping on the spatial distrib ution of the excited-state population in sodium vapor, interacting wit h a linearly polarized Gaussian laser beam. Counterintuitively the exc itation volume experiences a strong spatial shrinking at high optical. depth. The interpretation of this nonlocal effect is based on the num erical solution of the stationary Holstein equation, which takes into account the full frequency dependence of the reabsorption probability within the process of diffusion of radiation. The calculations perform ed are in good qualitative agreement with the spatial effects observed experimentally.