Superradiant and subradiant states in lifetime-limited organic molecules through laser-induced tuning

TL;DR

This paper demonstrates a laser-induced tuning method to create superradiant and subradiant states in pairs of lifetime-limited organic molecules, enabling control over collective quantum phenomena in nanoscale arrays.

Contribution

It introduces a scalable laser tuning technique to achieve resonance in organic molecules, facilitating the study of collective quantum effects in sub-wavelength arrays.

Findings

Successful creation of superradiant and subradiant states in organic molecules

Resonance tuning achieved via laser-induced charge redistribution

Spectral and lifetime measurements agree with quantum models

Abstract

An array of radiatively coupled emitters is an exciting new platform for generating, storing, and manipulating quantum light. However, the simultaneous positioning and tuning of multiple lifetime-limited emitters into resonance remains a significant challenge. Here we report the creation of superradiant and subradiant entangled states in pairs of lifetime-limited and sub-wavelength spaced organic molecules by permanently shifting them into resonance with laser-induced tuning. The molecules are embedded as defects in an organic nanocrystal. The pump light redistributes charges in the nanocrystal and dramatically increases the likelihood of resonant molecules. The frequency spectra, lifetimes, and second-order correlation agree with a simple quantum model. This scalable tuning approach with organic molecules provides a pathway for observing collective quantum phenomena in sub-wavelength arrays of quantum emitters.