Systematic study of thermal Rydberg EIT

Jia-You Liou^1*, Hsuan-Jui Su¹, I-Chun Lin¹, Yi-Hsin Chen^1,2

¹Department of Physics, National Sun Yat-Sen University, Kaohsiung, Taiwan
²Center for Quantum Technology, Hsinchu, Taiwan

* Presenter:Jia-You Liou, email:jungle267@gmail.com

We present Rydberg-state electromagnetically-induced-transparency (EIT) measurements on a thermal rubidium medium with a varied magnetic field, laser intensity, laser polarization, and optical density. The EIT characteristics, such as peak height and linewidth, can be optimized by choosing the optimum probe field intensity in different optical densities. Besides, the optical pumping effect was considered. Our theoretical model based on a simplified non-perturbation Doppler-free numerical calculation can predict the EIT features well after accounting for the relevant Clebsch-Gordan coefficients, Zeeman splittings, and Doppler shifts. In our analysis, the effect of the atomic vapor, whether by optical pumping, heating, or other means, is converted into the parameter optical densities so that the parameters determining the Rydberg EIT peak height are reduced to laser intensity and optical densities. Our work advances relevant research, such as the Forster resonance study and quantum sensors.

Keywords: Rydberg EIT, optical pumping, optical densities