Issue |
J. Eur. Opt. Society-Rapid Publ.
Volume 20, Number 1, 2024
Plasmonica
|
|
---|---|---|
Article Number | 11 | |
Number of page(s) | 7 | |
DOI | https://doi.org/10.1051/jeos/2024009 | |
Published online | 16 April 2024 |
Research Article
Tailoring second harmonic emission by ZnO nanostructures: Enhancement of directionality
Sapienza University of Rome, SBAI Department, Rome 00161, Italy
* Corresponding author: emilija.petronijevic@uniroma1.it
Received:
28
December
2023
Accepted:
28
February
2024
Tailoring nonlinear optical properties at the nanoscale is a hot topic in nowadays nanophotonics, promising for applications spanning from sensing to ultrafast optical communications. Here we present a numerical approach of designing a simple semiconductor nanostructure able to tailor second harmonic emission in the near- and far-field. We start from linear simulations of ZnO nanospheres, which reveal multipolar nature of the scattering. Next, we show how the same nanospheres, with radii in 30–130 nm range, excited at 800 nm, manipulate the directivity of the emitted second harmonic. We observe that the nanospheres which exhibit Kerker condition at 400 nm, emit the second harmonic field in the forward direction. We further investigate how the asymmetry (ellipsoid geometry) tailors the second harmonic directivity. We finally introduce geometry with low chiro-optical response, and observe that the second harmonic far-field depends on the handedness of the light exciting the nanostructure at 800 nm.
Key words: Nanostructures / Nanophotonics / Nonlinear / Electromagnetic simulations
© The Author(s), published by EDP Sciences, 2024
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.