Materials science

Boron nitride

Hexagonal boron nitride

Optoelectronics

Delocalized electron

Quantum

Physics

Quantum entanglement

Nanotechnology

Quantum mechanics

Graphene

Plasmon

Photonics

Optica

Cooperative phenomena stemming from radiation-field-mediated coupling between individual quantum emitters are presently attracting broad interest for on-chip photonic quantum memories and longrange entanglement.Common to these applications is the generation of electro-magnetic modes over macroscopic distances.Much research, however, is still needed before such systems can be deployed in the form of practical devices, starting with the investigation of alternate physical platforms.Quantum emitters in two-dimensional (2D) systems provide an intriguing route because these materials can be adapted to arbitrarily shaped substrates to form hybrid systems where emitters are near-field-coupled to suitable optical modes.Here, we report a scalable coupling method allowing color center ensembles in a van der Waals material -hexagonal boron nitride -to couple to a delocalized high quality plasmonic surface lattice resonance.This type of architecture is promising for photonic applications, especially given the ability of the hexagonal boron nitride emitters to operate as singlephoton sources at room temperature.

Near-deterministic activation of room-temperature quantum emitters in hexagonal boron nitride