Controlling Quasibound States in 1D Continuum Through Electromagnetic Induced Transparency Mechanism

TL;DR

This paper demonstrates how electromagnetic induced transparency (EIT) can be used to control photon reflection and transmission in a 1D cavity array with a three-level atom, enabling potential quantum photon storage.

Contribution

It introduces a method to manipulate photon transport in a 1D cavity array using EIT with a three-level atom, and proposes a quantum coherence photon storage device.

Findings

Complete control over photon reflection and transmission via EIT.

Emergence of quasibound photon states in a secondary cavity.

Potential for all-optical quantum photon storage.

Abstract

We study the coherent scattering process of a single photon confined in an one-dimensional (1D) coupled cavity-array, where a $\Lambda$-type three-level atom is placed inside one of the cavities in the array and behaves as a functional quantum node (FQN). We show that, through the electromagnetic induced transparency (EIT) mechanism, the $\Lambda$-type FQN bears complete control over the reflection and transmission of the incident photon along the cavity-array. We also demonstrate the emergence of a quasibound state of the single photon inside a secondary cavity constructed by two distant FQN's as two end mirrors, from which we are motivated to design an all-optical single photon storage device of quantum coherence.