Tuning of the Hanle effect from EIT to EIA using spatially separated probe and control beams

Abstract

We demonstrate a technique for continuous tuning of the Hanle effect from electromagnetically induced transparency (EIT) to electromagnetically induced absorption (EIA) by changing the polarization ellipticity of a control beam. In contrast to previous work in this field, we use spatially separated probe and control beams. The experiments are done using magnetic sublevels of the $F_g=4\to F_e=5$ closed hyperfine transition in the 852 nm D${}_2$ line of ${}^{133}$Cs. The atoms are contained in a room temperature vapor cell with anti-relaxation (paraffin) coating on the walls. The paraffin coating is necessary for the atomic coherence to be transported between the beams. The experimental results are supported by a density-matrix analysis of the system, which also explains the observed amplitude and zero-crossing of the resonances. Such continuous tuning of the sign of a resonance has important applications in quantum memory and other precision measurements.

16 pages, 8 figures

References in corpus (3)

• Anti-Parity-Time Symmetric Optics via Flying Atoms
• Sub- and super-luminal light propagation using a Rydberg state
• Polarization dependent tuning of the Hanle effect in the ground state of Cs

Cited by in corpus (3)

• Study of EIT resonances in an anti-relaxation coated Rb vapor cell
• Interplay between electromagnetically induced transparency(EIT), absorption (EIA) and Autler-Townes (AT) splitting in N-type atomic system: An experiment and theory
• Laser interferometry based on atomic coherence