Second-harmonic generation in multilayer hexagonal boron nitride flakes

Abstract

We report second-harmonic generation (SHG) from thick hexagonal boron nitride (hBN) flakes with approximately 109-111 layers. The resulting effective second-order susceptibility is similar to previously reported few-layer experiments. This confirms that thick hBN flakes can serve as a platform for nonlinear optics, which is useful because thick flakes are easy to exfoliate while retaining a large flake size. We also show spatial second-harmonic maps revealing that SHG remains a useful tool for the characterization of the layer structure even in the case of a large number of layers.

References in corpus (6)

• 2D materials and van der Waals heterostructures
• Photonic Crystal Cavities from Hexagonal Boron Nitride
• Characterization of the second- and third-harmonic optical susceptibilities of atomically thin tungsten diselenide
• Cavity nonlinear optics with layered materials
• Gauge invariance of excitonic linear and nonlinear optical response
• Cascaded third harmonic generation in hybrid graphene-semiconductor waveguides

Cited by in corpus (11)

• Fabrication methods for integrating 2D materials
• Nonlinear twistoptics at symmetry-broken interfaces
• Nonlinear optics in 2D materials: from classical to quantum
• Nonlinear Tunable Vibrational Response in Hexagonal Boron Nitride
• Nonlinear optical study of commensurability effects in graphene-hBN heterostructures
• Properties and device performance of BN thin films grown on GaN by pulsed laser deposition
• Non-linear optics at twist interfaces in h-BN/SiC heterostructures
• Large few-layer hexagonal boron nitride flakes for nonlinear optics
• Deterministic fabrication of graphene hexagonal boron nitride moiré superlattices
• Advancements in Entangled Photon Pairs in 2D Van der Waals Materials for On-chip Quantum Applications
• Dielectric environment engineering via 2D material heterostructure formation on hybrid photonic crystal nanocavity