Time-resolved Stark effect in rapidly varying fields
Abstract
The cycle-averaged ac Stark effect associated with the [A]2Σ+v'=2?[X]2Π1/2v'=0 two-photon absorption of NO at intensities between 7.7 and 15.2 TW cm-2 has been characterized in real time through a synergic combination of bichromatic laser experiments and quantum-dynamics calculations. Measurements of the fluorescence emitted by the Rydberg [A]2Σ+v'=2 level as a function of time between Stark and probe components of a bichromatic field exhibit a characteristic evolution in temporal peak structure with Stark-field intensity, which is interpreted in terms of a time-dependent Floquet analysis of the laser-matter interaction. The experimental observations are consistent with a dynamic Stark shift of Δεs(ω1,ω2)≤0.23 eV of the optical transition at these intensities.
- Publication:
-
Applied Physics B: Lasers and Optics
- Pub Date:
- April 2002
- DOI:
- 10.1007/s003400200839
- Bibcode:
- 2002ApPhB..74..577L
- Keywords:
-
- PACS: 32.60.+i;
- 32.80.Rm;
- 33.80.Rv;
- 42.50.Hz