https://doi.org/10.1051/epjconf/202125507003
Second and third harmonic generation from gold nanolayers: experiment versus theory
1 Department of Physics, Universitat Politècnica de Catalunya, Rambla Sant Nebridi 22, 08222, Terrassa, Spain
2 AEgis Technologies Inc., 401 Jan Davis Dr., Huntsville, Alabama 35806, USA
3 Department of Information Engineering – University of Padova, Via Gradenigo 6/a, 35131, Padova, Italy
4 Department of Information Engineering – University of Brescia, Via Branze 38, 25123, Brescia, Italy
5 Aviation and Missile Center, US Army CCDC, Redsone Arsenal, AL 35898-5000, USA
* Corresponding author: laura.rodriguez.sune@upc.edu
Published online: 18 November 2021
The use of semiconductors, metals, or ordinary dielectrics in the process of fabrication of nanodevices is at the front edge of nowadays technology, exploiting the properties of light propagation and localization at nanometric scale in new and surprising ways. Understanding accurately how light interacts with these materials at the nanoscale is crucial if one is to properly engineer nano-devices. When the nanoscale is reached, light-matter interactions display new phenomena where conventional approximations may not always be applicable and they should be either revised or voided. In this work, we measure the efficiency of second and third harmonic generation from gold nanolayers. The experimental results are compared with numerical simulations based on a detailed microscopic hydrodynamic model that considers different effects playing a role in the nonlinear response, not usually considered by more generic models. The agreement between experimental and theoretical results proves the importance of all these contributions.
© The Authors, published by EDP Sciences, 2021
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
