Tuning the second-harmonic generation in AlGaAs nanodimers via non-radiative state optimization [Invited]


Dielectric nanocavities are emerging as a versatile and powerful tool for the linear and nonlinear manipulation of light at the nanoscale. In this work, we exploit the effective coupling of electric and toroidal modes in AlGaAs nanodimers to locally enhance both electric and magnetic fields while minimizing the optical scattering, thereby optimizing their second-harmonic generation efficiency with respect to the case of a single isolated nanodisk. We also demonstrate that proper near-field coupling can provide further degrees of freedom to control the polarization state and the radiation diagram of the second-harmonic field.

Publication DOI: https://doi.org/10.1364/PRJ.6.0000B6
Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
College of Engineering & Physical Sciences > Systems analytics research institute (SARI)
Additional Information: © 2018 Chinese Laser Press Funding: MSCA-COFUND-MULTIPLY - Grant number 713694 - H2020.
Publication ISSN: 2327-9125
Full Text Link:
Related URLs: https://www.osa ... ?URI=prj-6-5-B6 (Publisher URL)
PURE Output Type: Article
Published Date: 2018-04-11
Published Online Date: 2018-01-19
Accepted Date: 2018-01-19
Authors: Rocco, Davide
Gili, Valerio F.
Ghirardini, Lavinia
Carletti, Luca
Favero, Ivan
Locatelli, Andrea
Marino, Giuseppe
Neshev, Dragomir N.
Celebrano, Michele
Finazzi, Marco
Leo, Giuseppe
De Angelis, Costantino



Version: Published Version

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