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 (2D) material. We examine defects in hexagonal boron nitride (hBN) 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.
Highlights
Two-photon absorption is an important non-linear process employed for high resolution bio-imaging and non-linear optics
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
We demonstrate for the first time non-linear excitation of a single emitter in a two-dimensional material, namely, single defects in hexagonal boron nitride (hBN) flakes via two-photon excitation
Summary
Two-photon absorption is an important non-linear process employed for high resolution bio-imaging and non-linear optics. We examine defects in hexagonal boron nitride (hBN) and show that the emitters exhibit similar spectral and quantum properties under one-photon and two-photon excitation.
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