# Electromagnetically Induced Transparency in $\Lambda$-systems of $^{87}Rb$ atom in magnetic field

## TL;DR

This paper investigates electromagnetically induced transparency in two $b1$-systems of $^{87}$Rb atoms under magnetic fields, demonstrating differences in EIT signals and potential for precise laser frequency locking.

## Contribution

It provides detailed experimental analysis and theoretical modeling of EIT in two specific $b1$-systems of $^{87}$Rb atoms, highlighting the impact of magnetic fields.

## Key findings

- Second $b1$-system yields higher EIT signal magnitude.
- Magnetic field enhances the steepness of the EIT signal slope.
- Results support potential for tight laser frequency locking.

## Abstract

The electromagnetically induced transparency (EIT) observations in two $\Lambda$-systems of $^{87}Rb$ atom, $|5^{2}S_{1/2} F=1\rangle \rightarrow |5^{2}P_{3/2} F'=1\rangle \leftarrow |5^{2}S_{1/2} F=2\rangle$ and $|5^{2}S_{1/2} F=1\rangle \rightarrow |5^{2}P_{3/2} F'=2\rangle \leftarrow |5^{2}S_{1/2} F=2\rangle$, have been investigated in detail and the results are found consistent with our proposed theoretical models. The second $\Lambda$-system provides EIT signal with higher magnitude than the first system, both in absence and in presence of an applied magnetic field. The observed steeper slope of the EIT signal in presence of the magnetic field can enable one to achieve tight frequency locking of lasers using these EIT signals.