Non-linear excitation of quantum emitters in two-dimensional hexagonal boron nitride

TL;DR

This paper demonstrates two-photon excitation of quantum emitters in 2D hexagonal boron nitride, revealing their spectral and quantum properties, and highlighting potential for quantum non-linear photonics.

Contribution

It is the first to show two-photon excitation of quantum emitters in 2D hexagonal boron nitride with comparable properties to one-photon excitation.

Findings

Quantum emitters exhibit similar spectral properties under two-photon excitation.

Two-photon excitation enables high-resolution quantum photonic applications.

Findings support deployment of 2D hBN in non-linear quantum photonics.

Abstract

Two-photon absorption is an important non-linear process employed for high resolution bio-imaging and non-linear optics. In this work we realize two-photon excitation of a quantum emitter embedded in a two-dimensional material. We examine defects in hexagonal boron nitride and show that the emitters exhibit similar spectral and quantum properties under one-photon and two-photon excitation. Furthermore, our findings are important to deploy two-dimensional hexagonal boron nitride for quantum non-linear photonic applications.