In:
Optics Express, Optica Publishing Group, Vol. 31, No. 5 ( 2023-02-27), p. 7545-
Abstract:
We study Rydberg electromagnetically induced transparency (EIT) of a cascade three-level atom involving 80 D 5/2 state in a strong interaction regime employing a cesium ultracold cloud. In our experiment, a strong coupling laser couples 6 P 3/2 to 80 D 5/2 transition, while a weak probe, driving 6 S 1/2 to 6 P 3/2 transition, probes the coupling induced EIT signal. At the two-photon resonance, we observe that the EIT transmission decreases slowly with time, which is a signature of interaction induced metastability. The dephasing rate γ OD is extracted with optical depth OD = γ OD t . We find that the optical depth linearly increases with time at onset for a fixed probe incident photon number R in before saturation. The dephasing rate shows a nonlinear dependence on R in . The dephasing mechanism is mainly attributed to the strong dipole-dipole interactions, which leads to state transfer from nD 5/2 to other Rydberg states. We demonstrate that the typical transfer time τ 0(80 D ) obtained by the state selective field ionization technique is comparable with the decay time of EIT transmission τ 0(EIT) . The presented experiment provides a useful tool for investigating the strong nonlinear optical effects and metastable state in Rydberg many-body systems.
Type of Medium:
Online Resource
ISSN:
1094-4087
Language:
English
Publisher:
Optica Publishing Group
Publication Date:
2023
detail.hit.zdb_id:
1491859-6
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