Ultraslow long-living plasmons with electromagnetically induced transparency

TL;DR

This paper demonstrates how electromagnetically induced transparency (EIT) can significantly slow down surface plasmon polaritons (SPPs), extending their lifetime to microseconds and enabling high-precision control of plasmonic signals.

Contribution

It provides an analytical framework showing how EIT can reduce plasmon velocities by four orders of magnitude and greatly enhance their lifetime.

Findings

SPPs can be slowed down by four orders of magnitude using EIT.

SPP lifetime can be extended to microseconds.

High-frequency resolution is achieved through EIT.

Abstract

We analytically examine propagation of surface plasmon polaritons (SPPs) at a thin metallic film between glass substrate and electromagnetically-induced-transparency (EIT) medium. High-precision and high-resolution in frequency domain provided by EIT paves the way towards plasmonic group velocities reduction even by $4$ orders of magnitude and corresponding lifetime enhancement of SPPs up to microseconds.