Resonant Structure of Second Harmonic Generation in Multilayer Graphene Polytypes
Mesoscale and Nanoscale Physics
2026-03-25 v2
Abstract
Second harmonic generation (SHG) is a powerful optical tool for identifying non-centrosymmetric crystalline structures. Here, we analyze SHG in multilayer graphenes (MLG), with a focus on its dependence on the stacking order, encapsulation environment and biasing which break inversion symmetry in multilayers, as well as the SHG sensitivity to the electron-hole asymmetry in the MLG spectra and doping. In particular, we identify stacking-order-dependent resonant features in the SHG spectra for trilayers and tetralayers, suggesting that infra-red range SHG offers a non-invasive characterization method for distinguishing between MLG polytypes, as well as optical identification of crystallographic direction in MLG films.
Keywords
Cite
@article{arxiv.2508.15668,
title = {Resonant Structure of Second Harmonic Generation in Multilayer Graphene Polytypes},
author = {Patrick Johansen Sarsfield and Takaaki V. Joya and Takuto Kawakami and Mikito Koshino and Vladimir Fal'ko},
journal= {arXiv preprint arXiv:2508.15668},
year = {2026}
}
Comments
8 pages, 4 figures