Computational Nanophotonics

Multiresonant all-dielectric metasurfaces based on high-order multipole coupling in the visible

I. Allayarov, A. B. Evlyukhin, A. Calà Lesina

- Optics Express, 2024 -

DOI: 10.1364/OE.511172


Dynamic Nanophotonics in Epsilon-Near-Zero Conductive Oxide Films and Metasurfaces: A Quantitative, Nonlinear, Computational Model

J. Baxter, A. Pérez-Casanova, L. Cortes-Herrera, A. Calà Lesina, I. De Leon, L. Ramunno

- Advanced Photonics Research, 2023 -

DOI: 10.1002/adpr.202200280


Parallel FDTD modelling of nonlocality in plasmonics

J. Baxter, A. Calà Lesina, L. Ramunno

- IEEE Transactions on Antennas and Propagation, 2021 -

DOI: 10.1109/TAP.2020.3044579

Parallelization strategy: 2-D representation of magnetic and electric field data transfers between adjacent subdomains.

Staircasing artifacts are much more prominent in (a) for LRA (local response approximation) FDTD than in (b) for nonlocal Drude FDTD

Modelling of nanophotonic non-linear metasurfaces, chapter 4

A. Calà Lesina, P. Berini, L. Ramunno

-  Integrated Optics Volume 1, 2020 -

DOI: 10.1049/PBCS077F_ch4

Design of a metasurface for THG structured beam carrying OAM: (a) theoretical linear near field, (b) theoretical non-linear near field, (c) metasurface design for realizing the desired linear and non-linear near fields, (d) field distribution in the time domain (left) and frequency domain (right) obtained by FDTD simulation, and (e) computed non-linear far-field beam created by the metasurface


A. Calà Lesina, J. Baxter, P. Berini, L. Ramunno

- Quantum Nano-Photonics, 2018 -

DOI: 10.1007/978-94-024-1544-5_6


A. Calà Lesina, P. Berini, L. Ramunno

- Optical Materials Express, 2017 -

Understanding third harmonic generation (THG) in hybrid nanoantennas

3D nanoantenna model

THG near-field (electric field magnitude). The THG is simulated directly in the code.

On the convergence and accuracy of the FDTD method for nanoplasmonics

A. Calà Lesina, A. Vaccari, P. Berini, L. Ramunno

- Optics Express, 2015 -

DOI: 10.1364/OE.23.010481

3D simulations of sphere, dipole, and bow-tie nanoantennas.