Electromagnetically induced transparency at high optical power

TL;DR

This paper reports the experimental observation and theoretical analysis of electromagnetically induced transparency (EIT) in rubidium vapor across a range of optical powers, revealing how EIT characteristics evolve with intensity.

Contribution

It demonstrates EIT at high optical powers and provides a theoretical model explaining the dependence of EIT signal and width on Rabi frequency.

Findings

EIT observed at intensities from below saturation to several times saturation

Lorentzian width of EIT signal remains very small

EIT signal strength and width increase with Rabi frequency

Abstract

We observe electromagnetically induced transparency (EIT) in Rb vapor at various optical intensities, starting from below saturation to several times the saturation intensity. The observed Lorentzian width of the EIT signal is very small. Solving the time dependant density matrix equation of motion with a phenomenological decay constant, we find an expression suitable in explaining the EIT signal. In this experimental observation and theoretical analysis intensity of EIT signal and its Lorentzian width increases with Rabi frequency of optical field.