Near to short wave infrared light generation through AlGaAs-on-insulator nanoantennas

Year: 2023

Authors: Gandolfi M., Carletti L., Tognazzi A., Cino AC., De Angelis C., Guasoni M.

Autors Affiliation: Univ Brescia, Dipartimento Ingn Informaz, Via Branze 38, I-25123 Brescia, Italy; Consiglio Nazl Rircerche, Ist Nazl Ott, Via Branze 45, I-25123 Brescia, Italy; Consorzio Nazl Interuniv Telecomunicazioni CNIT, Viale GP Usberti 181-A,Sede Scientif Ingn Palazzin, I-43124 Parma, Italy; Univ Palermo, Dipartimento Ingn, Viale Sci Ed 10, I-90128 Palermo, Italy; Univ Southampton, Optoelect Res Ctr, Univ Rd West Highfield Campus B46, Southampton SO17 1BJ, England.

Abstract: AlGaAs-on-insulator (AlGaAs-OI) has recently emerged as a promising platform for nonlinear optics at the nanoscale. Among the most remarkable outcomes, second -harmonic generation (SHG) in the visible/near infrared spectral region has been demonstrated in AlGaAs-OI nanoantennas (NAs). In order to extend the nonlinear frequency generation towards the short wave infrared window, in this work we propose and demonstrate via numerical simulations difference frequency generation (DFG) in AlGaAs-OI NAs. The NA geometry is finely adjusted in order to obtain simultaneous optical resonances at the pump, signal and idler wavelengths, which results in an efficient DFG with conversion efficiencies up to 0.01%. Our investigation includes the study of the robustness against random variations of the NA geometry that may occur at fabrication stage. Overall, these outcomes identify what we believe to be a new potential and yet unexplored application of AlGaAs-OI NAs as compact devices for the generation and control of the radiation pattern in the near to short infrared spectral region. Published by Optica Publishing Group under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

Journal/Review: OPTICS EXPRESS

Volume: 31 (19)      Pages from: 31051  to: 31060

More Information: Horizon 2020 Framework Programme (899673, 802682) ; Ministero dell’Istruzione, dell’Universita e della Ricerca (2020EY2LJT_002) ; Ministero dell’Istruzione, dell’Universita e della Ricerca (2017MP7F8F) ; Russian Science Foundation (22-12-00204) ; Engineering and Physical Sciences Research Council (EP/T019441/1) .
KeyWords: Enhanced 2nd-harmonic Generation; Resonance; Gaas
DOI: 10.1364/OE.498592

Citations: 1
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