Study of EIT resonances in an anti-relaxation coated Rb vapor cell

TL;DR

This paper explores the properties of bright and dark EIT resonances in a coated Rb vapor cell, combining experimental and theoretical approaches, with implications for advanced light propagation and magnetometry.

Contribution

It demonstrates the coexistence of bright and dark EIT resonances in a coated Rb vapor cell and provides a theoretical model to explain these phenomena.

Findings

Bright and dark EIT resonances observed experimentally.

Theoretical model accurately reproduces experimental spectra.

Potential applications in sub- and super-luminal light propagation and magnetometry.

Abstract

We demonstrate---experimentally and theoretically---that resonances obtained in electromagnetically induced transparency (EIT) can be both bright and dark. The experiments are done using magnetic sublevels of a hyperfine transition in the D$_1$ line of $^{87}$Rb. The degeneracy of the sublevels is removed by having a magnetic field of value 27 G. The atoms are contained in a room-temperature vapor cell with anti-relaxation coating on the walls. Theoretical analysis based on a two-region model reproduces the experimental spectrum quite well. This ability to have both bright and dark resonances promises applications in sub- and super-luminal propagation of light, and sensitive magnetometry.