Frequency shift in saturation spectroscopy induced by mechanical effects of light

Year: 1999

Authors: Minardi F., Artoni M., Cancio P., Inguscio M., Giusfredi G., Carusotto I.

Autors Affiliation: Istituto Nazionale di Fisica della Materia (INFM) and European Laboratory for Nonlinear Spectroscopy (LENS),
Largo Enrico Fermi 2, I-50125 Firenze, Italy; Istituto Nazionale di Ottica (INO), Largo Enrico Fermi 6, I-50125 Firenze, Italy; Scuola Normale Superiore, Piazza dei Cavalieri 7, I-56125 Pisa, Italy

Abstract: We report on a substantial light-force-induced line-center shift of the sub-Doppler dip in a saturation spectroscopy configuration where mechanical effects are expected to be negligible. We observe the shift on the 2 S-3(1)–>2 P-3(1) Open transition of He-4 that is relevant for a determination of the fine-structure constant alpha [Phys. Rev. Lett. 82, 1112 (1999)]. We discuss the physical origin of the shift and we provide a numerical analysis to support our interpretation. The shift can be quite important for various other high-precision spectroscopy measurements. [S1050-2947(99)08811-3].


Volume: 60 (5)      Pages from: 4164  to: 4167

KeyWords: Saturation Spectroscopy; mecanichal effects;
DOI: 10.1103/PhysRevA.60.4164

Citations: 21
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