Demonstration of double EIT using coupled harmonic oscillators and RLC circuits

TL;DR

This paper demonstrates single and double electromagnetically induced transparency (EIT) using coupled harmonic oscillators and RLC circuits, providing accessible models for educational purposes.

Contribution

It introduces mechanical and electrical analogs to study EIT, with analytical solutions and experimental demonstrations suitable for undergraduate labs.

Findings

Analytical solutions reveal conditions for single and double EIT

Experimental RLC circuits successfully demonstrate EIT phenomena

Models are simple and educationally accessible

Abstract

Single and double electromagnetically induced transparency (EIT) in a medium, consisting of four-level atoms in the inverted-Y configuration, are discussed using mechanical and electrical analogies. A three coupled spring-mass system subject to damping and driven by an external force is used to represent the four-level atom mechanically. The equations of motion of this system are solved analytically, which revealed single and double EIT. On the other hand, three coupled RLC circuits are used, as the electrical analog, to explore and experimentally demonstrate single and double EIT. The simplicity of these two models makes this experiment appropriate for undergraduate students and easy to incorporate into a college physics laboratory.