Large few-layer hexagonal boron nitride flakes for nonlinear optics

Abstract

Hexagonal boron nitride (hBN) is a layered dielectric material with a wide range of applications in optics and photonics. In this work, we demonstrate a fabrication method for few-layer hBN flakes with areas up to 5000 $\mu \mathrm{m}$. We show that hBN in this form can be integrated with photonic microstructures: as an example, we use a circular Bragg grating (CBG). The layer quality of the exfoliated hBN flake on a CBG is confirmed by second-harmonic generation (SHG) microscopy. We show that the SHG signal is uniform across the hBN sample outside the CBG and is amplified in the centre of the CBG.

References in corpus (8)

• Hunting for Monolayer Boron Nitride: Optical and Raman Signatures
• The hot pick-up technique for batch assembly of van der Waals heterostructures
• Graphene-Based Integrated Photonics For Next-Generation Datacom And Telecom
• A Room Temperature Polariton Light-Emitting Diode Based on Monolayer WS2
• Light from van der Waals quantum tunneling devices
• Upconverted electroluminescence via Auger scattering of interlayer excitons in van der Waals heterostructures
• Cavity nonlinear optics with layered materials
• Second-harmonic generation in multilayer hexagonal boron nitride flakes

Cited by in corpus (2)

• Nonlinear chiral metasurfaces based on structured van der Waals materials
• Mechanisms and Opportunities for Tunable High-Purity Single Photon Emitters: A Review of Hybrid Perovskites and Prospects for Bright Squeezed Vacuum