Coherent effects on the Zeeman sublevels of hyperfine states at the D-1 and D-2 lines of Rb

Citation
G. Alzetta et al., Coherent effects on the Zeeman sublevels of hyperfine states at the D-1 and D-2 lines of Rb, J OPT B-QUA, 3(3), 2001, pp. 181-188
Citations number
14
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF OPTICS B-QUANTUM AND SEMICLASSICAL OPTICS
ISSN journal
14644266 → ACNP
Volume
3
Issue
3
Year of publication
2001
Pages
181 - 188
Database
ISI
SICI code
1464-4266(200106)3:3<181:CEOTZS>2.0.ZU;2-8
Abstract
Subnatural-width resonances due to coherent effects in optical pumping at h yperfine (hf) transitions of Rb are investigated using a linearly or circul arly polarized single-frequency diode laser beam. The sign and amplitude of the resonances in the fluorescence are measured by scanning the laser freq uency over the hf transitions of the Rb D-1 and D-2 lines. The fluorescence perpendicular to the laser beam is detected as a function of magnetic fiel d parallel to the beam propagation and scanned around zero value. In the ca se of linear polarization of the field, dark resonances are observed for hf transitions with F-g --> F-e = F-g - 1 and F-g --> F-e = F-g, and bright r esonances are observed for transitions with F-g --> F-e = F-g + 1. This is in agreement with the recently developed theories. For all (except F-g = 2 --> F-e = 3, Rb-85, D-1 line) hf transitions the sign of the resonances rev erses when the polarization of the field changes to circular. The amplitude s of the resonances correspond to the probability of the hf transitions and to the calculated loss rate of the population to the ground hf level not e xcited by the laser field. The observed narrow resonances (FWHM: few tens o f kHz) and their sensitivity to weak magnetic fields are interesting for hi gh-resolution spectroscopy and for development of simple and precise magnet ometers.