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 23S1→23P1 open transition of 4He that is relevant for a determination of the fine-structure constant α [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.
Frequency shift in saturation spectroscopy induced by mechanical effects of light / F. Minardi;M. Artoni;P. Cancio;M. Inguscio;G. Giusfredi;I. Carusotto. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - STAMPA. - 60:(1999), pp. 4164-4167. [10.1103/PhysRevA.60.4164]
Frequency shift in saturation spectroscopy induced by mechanical effects of light
MINARDI, FRANCESCO;INGUSCIO, MASSIMO;GIUSFREDI, GIOVANNI;
1999
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 23S1→23P1 open transition of 4He that is relevant for a determination of the fine-structure constant α [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.
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