Electric field induced hyperfine level-crossings in (nD)Cs at two-step laser excitation: Experiment and theory
✍ Scribed by M. Auzinsh; K. Blushs; R. Ferber; F. Gahbauer; A. Jarmola; M. Tamanis
- Publisher
- Elsevier Science
- Year
- 2006
- Tongue
- English
- Weight
- 388 KB
- Volume
- 264
- Category
- Article
- ISSN
- 0030-4018
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✦ Synopsis
The pure electric field level-crossing of m F Zeeman sublevels of hyperfine F levels at two-step laser excitation is described theoretically and studied experimentally for the nD 3/2 states in Cs with n = 7, 9 and 10, by applying a diode laser in the first 6S 1/2 ! 6P 3/2 step and a diode or dye laser for the second 6P 3/2 ! nD 3/2 step. Level-crossing resonance signals are observed in the nD 3/2 ! 6P 1/2 fluorescence. A theoretical model is presented to describe quantitatively the resonance signals by correlation analysis of the optical Bloch equations in the case when an atom simultaneously interacts with two laser fields in the presence of an external dc electric field. The simulations describe well the experimental signals. The tensor polarizabilities a 2 (in a 3 0 ) are determined to be 7.45(20) • 10 4 for the 7D 3/2 state and 1.183(35) • 10 6 for the 9D 3/2 state; the electric field calibration is based on measurements of the 10D 3/2 state, for which a 2 is well established. The a 2 value for the 7D 3/2 state differs by ca. 15% from the existing experimentally measured value.