6533b828fe1ef96bd1287849
RESEARCH PRODUCT
Nonlinear Hanle effect in Cs vapor under strong laser excitation
Marcis AuzinshAram PapoyanKlaas Bergmannsubject
Hanle effectPhysicseducation.field_of_studyPopulationOptical physicsOptical polarizationLaserAtomic and Molecular Physics and Opticslaw.inventionOptical pumpinglawAtomic physicseducationGround stateExcitationdescription
We report results of a theoretical and experimental study of the ground state nonlinear Hanle effect under strong laser excitation. It is shown that besides the well-known zero-magnetic field suppression of absorption on F g = F→F e = F - 1 transitions caused by population trapping, an optical pumping induced enhanced absorption occurs on F g = F→F e = F + 1 transitions for small B-fields. The latter effect becomes more pronounced for high F values. The experiment with atomic vapor of Cs (D2 line, F g = 4) confirms an increase of the spectrally unresolved fluorescence yield at zero magnetic field and 600 mW/cm2 laser intensity by 9% or 42%, when excitation occurs with linearly or circularly polarized light, respectively. The results of the experiment agree with numerical simulation studies using equations of motion for a density matrix.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2002-10-01 | The European Physical Journal D - Atomic, Molecular and Optical Physics |