Optical tuning of dielectric nanoantennas for thermo-optically reconfigurable nonlinear metasurfaces

Anno: 2021

Autori: Celebrano M., Rocco D., Gandolfi M., Zilli A., Rusconi F., Tognazzi A., Mazzanti A., Ghirardini L., Pogna EAA., Carletti L., Baratto C., Marino G., Gigli C., Biagioni P., Dut L., Cerullo G., Leo G., Della Valle G., Finazzi M., De Angelis C.

Affiliazione autori: Politecn Milan, Dipartimento Fis, Piazza Leonardo da Vinci 32, I-20133 Milan, Italy; Univ Brescia, Dipartimento Ingn Informaz, Via Branze 38, I-25123 Brescia, Italy; CNR, Ist Nazl Ott, Via Branze 45, I-25123 Brescia, Italy; CNR, Ist Nanosci, NEST, I-56127 Pisa, Italy; Scuola Normale Super Pisa, I-56127 Pisa, Italy; Univ Paris, Mat & Phenomenes Quant, 10 Rue Alice Domon & Leonie Duquet, F-75013 Paris, France; CNR, Ist Foton Nanotecnol, Piazza Leonardo da Vinci 32, I-20133 Milan, Italy.

Abstract: 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. (C) 2021 Optical Society of America

Giornale/Rivista: OPTICS LETTERS

Volume: 46 (10)      Da Pagina: 2453  A: 2456

Maggiori informazioni: European Commission (H2020-FETOPEN-2018-2020 no. 899673); Consiglio Nazionale delle Ricerche (SAC.AD002.026); Italian Ministry of University and Research (2017MP7F8F); ANR (ANR-18-CE92-0043).
Parole chiavi: Enhanced 2nd-harmonic Generation
DOI: 10.1364/OL.420790

Citazioni: 37
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-11-17
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