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Polarization-dependent optical Stark effect on Fraunhofer-type absorption in DP LIBS.

Authors :
Nagli, L.
Gaft, M.
Raichlin, Y.
Source :
Spectrochimica Acta Part B. Apr2024, Vol. 214, pN.PAG-N.PAG. 1p.
Publication Year :
2024

Abstract

Polarization, broadening, and splitting in Fraunhofer-type absorption (FTA) spectra are observed in colinear Double-Pulse Lase-Induced Breakdown Spectroscopy (DP LIBS). Effects are attributable to the Optical Stark Effect (OSE) induced by the electric field of the second laser pulse within the first pulse-created plasma. This effect manifests exclusively in back-directed Laser-Induced Plasma (LIP) emission and during the presence of the second laser pulse. Notably, the OSE is absent in LIBS observations orthogonal to the direction of the laser beams. [Display omitted] • Some Fraunhofer-type absorption lines are polarized in the Double Pulse Laser-induced breakdown spectroscopy in back-directed laser-induced plasma emission geometry. • Polarization in Fraunhofer-type absorption is attributed to the Optical Stark effect induced by the electric field generated by the focused second laser beam. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
05848547
Volume :
214
Database :
Academic Search Index
Journal :
Spectrochimica Acta Part B
Publication Type :
Academic Journal
Accession number :
176407123
Full Text :
https://doi.org/10.1016/j.sab.2024.106886