Quantum Emission from Defects in Single Crystal Hexagonal Boron Nitride

TL;DR

This paper reports the discovery and detailed characterization of quantum emitters in bulk hexagonal boron nitride in the visible spectrum, highlighting its potential for quantum nanophotonics.

Contribution

It provides the first detailed study of quantum emission from defects in bulk hBN in the visible range, expanding understanding of its optical properties.

Findings

Quantum emission observed at room temperature

Defects in hBN act as quantum emitters

Enhanced understanding of hBN's optical properties

Abstract

Bulk hexagonal boron nitride (hBN) is a highly nonlinear natural hyperbolic material that attracts major attention in modern nanophotonics applications. However, studies of its optical properties in the visible part of the spectrum and quantum emitters hosted by bulk hBN have not been reported to date. In this work we study the emission properties of hBN crystals in the red spectral range using sub-bandgap optical excitation. Quantum emission from defects is observed at room temperature and characterized in detail. Our results advance the use of hBN in quantum nanophotonics technologies and enhance our fundamental understanding of its optical properties.