https://doi.org/10.1051/epjconf/202430905001
Second harmonic Circular Dichroism in Achiral Nanostructures
1 Department of Information Engineering, University of Brescia, Brescia, Italy
2 The School of Physics and Engineering, ITMO University, Saint-Petersburg, Russia
* e-mail: kristina.friziuk@unibs.it
** e-mail: anastasia.nikitina@metalab.ifmo.ru
Published online: 31 October 2024
We theoretically show that under circularly polarized plane wave or vortex beam illumination, the second-harmonic circular dichroism is possible even if the nanostructure is achiral. The interplay of nanostructure’s and crystalline lattice’s symmetries leads to specific conditions for observation of the circular dichroism, which can be expressed by a short formula. This can be particularly important for chiral sensing enhancement with nanostructure, where it is important to separate the signal from the nanostructure itself.
© The Authors, published by EDP Sciences, 2024
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.
