Control of second-harmonic generation in all-dielectric intersubband metasurfaces by controlling the polarity of?(2)
Anno: 2022
Autori: Sarma R., Xu JM., De Ceglia D., Carletti L., Klem J., Belkin MA., Brener I.
Affiliazione autori: Sandia Natl Labs, Albuquerque, NM 87123 USA; Sandia Natl Labs, Ctr Integrated Nanotechnol, Albuquerque, NM 87123 USA; Univ Texas Austin, Dept Elect & Comp Engn, Austin, TX 78712 USA; Univ Brescia, Dept Informat Engn, I-25121 Brescia, Italy; Univ Brescia, INO CNR, I-25121 Brescia, Italy; Tech Univ Munich, Walter Schottky Inst, D-85748 Garching, Germany.
Abstract: All-dielectric metasurfaces have recently led to a paradigm shift in nonlinear optics as they allow for circumventing the phase matching constraints of bulk crystals and offer high nonlinear conversion efficiencies when normalized by the light-matter interaction volume. Unlike bulk crystals, in all-dielectric metasurfaces nonlinear conversion efficiencies primarily rely on the material nonlinearity, field enhancements, and the modal overlaps, therefore most efforts to date have only focused on utilizing these degrees of freedom. In this work, we demonstrate that for second-harmonic generation in all-dielectric metasurfaces, an additional degree of freedom is the control of the polarity of the nonlinear susceptibility. We demonstrate that semiconductor heterostructures that support resonant nonlinearities based on quantum-engineered intersubband transitions provide this new degree of freedom. We can flip and control the polarity of the nonlinear susceptibility of the dielectric medium along the growth direction and couple it to the Mie-type photonic modes. Here we demonstrate that engineering the chi((2)) polarity in the meta-atom enables the control of the second-harmonic radiation pattern and conversion efficiency. Our results therefore open a new direction for engineering and optimizing second-harmonic generation using all-dielectric intersubband nonlinear metasurfaces.(c) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
Giornale/Rivista: OPTICS EXPRESS
Volume: 30 (19) Da Pagina: 34533 A: 34544
Maggiori informazioni: Basic Energy Sciences; Defense Advanced Research Projects Agency; Ministero dell’Istruzione,dell’Universita e della Ricerca.Parole chiavi: Harmonic-generationDOI: 10.1364/OE.468709Citazioni: 4dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-02-09Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui