Quantum optics with single molecules in a three-dimensional polymeric platform

TL;DR

This paper introduces a scalable, polymer-based 3D photonic platform with embedded molecules that maintain near-Fourier-limited fluorescence, enabling high photon fluxes and paving the way for advanced quantum photonic devices.

Contribution

It presents a novel 3D polymeric platform with embedded molecules for scalable quantum photonics, preserving emitter coherence and enabling complex device architectures.

Findings

Record-high photon fluxes from single molecules

Preservation of near-Fourier-limited fluorescence

Feasibility of integrated multi-photon devices

Abstract

The successful development of future photonic quantum technologies heavily depends on the possibility of realizing robust, reliable and, crucially, scalable nanophotonic devices. In integrated networks, quantum emitters can be deployed as single-photon sources or non-linear optical elements, provided their transition linewidth is broadened only by spontaneous emission. However, conventional fabrication approaches are hardly scalable, typically detrimental for the emitter coherence properties and bear limitations in terms of geometries and materials. Here we introduce an alternative platform, based on molecules embedded in polymeric photonic structures. Three-dimensional patterns are achieved via direct laser writing around selected molecular emitters, which preserve near-Fourier-limited fluorescence. By using an integrated polymeric design, record-high photon fluxes from a single cold molecule are reported. The proposed technology allows to conceive a novel class of quantum devices, including integrated multi-photon interferometers, arrays of indistinguishable single photon sources and hybrid electro-optical nanophotonic devices.