Second-harmonic generation in multilayer hexagonal boron nitride flakes
Optics
2020-01-08 v4
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.
Cite
@article{arxiv.1902.09060,
title = {Second-harmonic generation in multilayer hexagonal boron nitride flakes},
author = {Sejeong Kim and Johannes E. Fröch and Augustine Gardner and Chi Li and Igor Aharonovich and Alexander S. Solntsev},
journal= {arXiv preprint arXiv:1902.09060},
year = {2020}
}