Electromagnetically induced transparency in two channels of a $\Lambda$ system

TL;DR

This paper investigates electromagnetically induced transparency (EIT) in a $\\Lambda$ system with two channels, analyzing how EIT spectra vary with optical power and laser configurations using experimental and theoretical methods.

Contribution

It demonstrates the linear dependence of EIT width and intensity on pump power and explores EIT behavior under different laser scanning conditions using density matrix calculations.

Findings

EIT width and intensity increase linearly with pump power

EIT occurs in various laser scanning configurations

Theoretical density matrix model explains observed spectra

Abstract

We show two channel electromagnetically induced transparency (EIT) spectra at various optical power. The two channels are coupling field and probe field absorption. It is shown that EIT width and intensity increases linearly with pump power. A density matrix calculation is used to determine nature of EIT spectra induced by optical field. It has been observed that EIT occurs in cases when coupling laser is at fixed frequency while probe laser frequency is scanned, when coupling laser is frequency scanned and probe is at fixed frequency.