Negative refraction with low absorption using EIT in a four-level left-handed atomic system

TL;DR

This paper proposes a scheme using EIT in a four-level atomic system to achieve negative refraction with low absorption, enabling transparent propagation in a common frequency range.

Contribution

It introduces a novel atomic system configuration that simultaneously exhibits negative refraction and transparency due to EIT, with low absorption and high figure of merit.

Findings

Negative refraction occurs with low absorption in the proposed system.

Both permittivity and permeability are negative in the same frequency range.

EIT effect reduces absorption, enhancing the figure of merit.

Abstract

We suggest a scheme for obtaining negative refraction with low absorption in a left-handed atomic system.Under the the appropriate conditions,the atomic system displays negative refraction with negative permittivity and permeability(Left-handedness)in a common frequency range,simultaneously.And the imaginary parts of permittivity and permeability show transparently propagate in the same frequency range.Finally,the negative refraction show low absorption due to the EIT effect,and the figure of merit demonstrated this in this resonant atomic system.