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

Year: 2018

Authors: Rocco D., Gili VF., Ghirardini L., Carletti L., Favero I., Locatelli A., Marino G., Neshev DN., Celebrano M., Finazzi M., Leo G., De Angelis C.

Autors Affiliation: Univ Brescia, Dept Informat Engn, Via Branze 38, I-25123 Brescia, Italy; Univ Paris Diderot, CNRS UMR 7162, Mat & Phenomenes Quant, 10 Rue A Domon & L Duquet, F-75013 Paris, France; Politecn Milan, Dept Phys, Piazza Leonardo Da Vinci 32, I-20133 Milan, Italy; Natl Inst Opt INO, Via Branze 45, I-25123 Brescia, Italy; Australian Natl Univ, Res Sch Phys & Engn, Nonlinear Phys Ctr, Canberra, ACT 2601, Australia.

Abstract: 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. (C) 2018 Chinese Laser Press.

Journal/Review: PHOTONICS RESEARCH

Volume: 6 (5)      Pages from: B6  to: B12

More Information: Australian Research Council (ARC); Education, Audiovisual and Culture Executive Agency (EACEA) (5659/002-001); SATT IdF-InnovUniversite Sorbonne (Double Culture-PhD program).
KeyWords: Dielectric Nanoantennas; 3rd-harmonic Generation; Optical Nanoantennas; Nanoparticles Driven; Silicon Nanodimers; Field Enhancement; Radiation; Resonances; Dimers; Modes
DOI: 10.1364/PRJ.6.0000B6

Citations: 49
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