Dark-Sates in Electromagnetically Induced Transparency Controlled by a Microwave Field

TL;DR

This paper explores how a microwave field influences dark states in electromagnetically induced transparency (EIT), revealing phase sensitivity and the possibility of EIT without dark states, thus extending understanding of EIT control mechanisms.

Contribution

It introduces an extended framework for dark states in EIT controlled by microwave fields, showing phase sensitivity and the occurrence of EIT without dark states.

Findings

Dark states are highly sensitive to microwave phase.

EIT can occur without dark states in this scheme.

Extended dark-state conditions are established.

Abstract

The rigorous dark-sate conditions, i.e., two-photon resonance, for a Lambda-type electromagnetically induced transparency (EIT) are extended with the system controlled by a microwave field. The extended dark-states are found to be extremely sensitive to the phase of the microwave field in a narrow interval. However, the dark-state is no longer the requirement for EIT in this scheme and EIT without dark states is present.