6533b831fe1ef96bd12984cb
RESEARCH PRODUCT
Optical tuning of dielectric nanoantennas for thermo-optically reconfigurable nonlinear metasurfaces
Carlo GigliMarco FinazziMarco GandolfiLamberto DuòPaolo BiagioniGiuseppe LeoAttilio ZilliAndrea TognazziGiulio CerulloC. BarattoGiuseppe Della ValleLavinia GhirardiniDavide RoccoLuca CarlettiMichele CelebranoGiuseppe MarinoCostantino De AngelisEva A. A. PognaFrancesco RusconiAndrea Mazzantisubject
Materials sciencebusiness.industryENHANCED 2ND-HARMONIC GENERATIONPhysics::OpticsNonlinear opticsSettore ING-INF/02 - Campi Elettromagnetici02 engineering and technologyDielectric021001 nanoscience & nanotechnology01 natural sciencesSignalAtomic and Molecular Physics and Opticsnonlinear optics optical tuning010309 opticsOpticsAmplitudeModulationAttenuation coefficient0103 physical sciences0210 nano-technologybusinessRefractive indexBeam (structure)description
We demonstrate optically tunable control of second-harmonic generation in all-dielectric nanoantennas: by using a control beam that is absorbed by the nanoresonator, we thermo-optically change the refractive index of the radiating element to modulate the amplitude of the second-harmonic signal. For a moderate temperature increase of roughly 40 K, modulation of the efficiency up to 60% is demonstrated; this large tunability of the single meta-atom response paves the way to exciting avenues for reconfigurable homogeneous and heterogeneous metasurfaces.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2021-05-10 | Optics Letters |