Multi-fold Enhancement of Quantum Dot Luminescence in a Plasmonic Metamaterial

TL;DR

This paper demonstrates that coupling semiconductor quantum dots with plasmonic metamaterials significantly enhances their luminescence intensity and spectral quality, driven by the Purcell effect, advancing the development of metamaterial-based optoelectronic devices.

Contribution

It introduces a method to enhance quantum dot luminescence using plasmonic metamaterials, highlighting controllable Purcell effect-based emission improvements.

Findings

Luminescence intensity increased multi-fold

Spectral narrowing observed in photoluminescence

Purcell effect confirmed as the enhancement mechanism

Abstract

We report that hybridizing semiconductor quantum dots with plasmonic metamaterial leads to a multi-fold intensity increase and narrowing of their photoluminescence spectrum. The luminescence enhancement is a clear manifestation of the cavity quantum electrodynamics Purcell effect that can be controlled by the metamaterial's design. This observation is an essential step towards understanding loss compensation in metamaterials with gain media and for developing metamaterial-enhanced gain media.