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arXiv · 2506.05656

Effects of inert background gases and photo-illumination on three-color electromagnetically induced transparency of rubidium vapor

Alisher Duspayev·Bineet Dash·Georg Raithel
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Abstract

Three-color Rydberg electromagnetically induced transparency (EIT) of room-temperature Rb vapor in the presence of inert gases (Ar, Ne, and N$_2$) at 50~mTorr and 500~mTorr is investigated. The observed EIT lines shift and develop blue-detuned satellite lines, dependent on inert-gas species and pressure. The separations of the satellite from the main EIT lines are approximately pressure-independent, while their strength increases with inert-gas pressure. The satellite lines are attributed to hyperfine collisions of the intermediate $5D_{3/2}$ state. Further, analyzing the Stark effect of Rydberg levels, it is found that the inert gases suppress static electric fields in the vapor cells, which we induce by photo-illumination of the cell walls with an auxiliary 453-nm laser. In the work, we utilize Rydberg levels with principal quantum numbers $n$ = 25 and 50 and angular momenta $\ell$ = 3 up to 6, excited by the EIT lasers and optional radio-frequency dressing fields. The work is of interest in the spectroscopic study of mixed-species warm vapors, in sensing applications of Rydberg atoms in vapor cells, and in non-invasive electric-field diagnostics of low-pressure discharge plasma.

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Alisher Duspayev, Bineet Dash, Georg Raithel. 2025-06-06. Effects of inert background gases and photo-illumination on three-color electromagnetically induced transparency of rubidium vapor. https://doi.org/10.1103/fyf8-4wml

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