Nonlocal resonances in pedestal high-index-contrast metasurfaces based on a silicon-on-insulator platform

Year: 2023

Authors: Franceschini P., Tognazzi A., Finco G., Carletti L., Alessandri I., Cino AC., De Angelis C., Takayama O., Malureanu R., Lavrinenko AV., De Ceglia D.

Autors Affiliation: Univ Brescia, Dept Informat Engn, Via Branze 38, I-25123 Brescia, Italy; CNR, Natl Inst Opt INO CNR, Via Branze 45, I-25123 Brescia, Italy; Univ Palermo, Dept Engn, Viale Sci ed 9, I-90128 Palermo, Italy; Swiss Fed Inst Technol, Inst Quantum Elect, Dept Phys, Opt Nanomat Grp, Auguste Piccard Hof 1, CH-8093 Zurich, Switzerland; Tech Univ Denmark, Dept Elect & Photon Engn, Orsteds Plads,Bldg 345A, DK-2800 Lyngby, Denmark.

Abstract: Subwavelength control of the electromagnetic field distribution represents one of the current challenges in photonics research. In this field, diffractive metasurfaces with spatially extended (i.e., nonlocal) resonant modes have recently gained great interest for their versatility in molding the electromagnetic field beyond the approximation of independent resonators. In this framework, we design a high-contrast nonlocal metasurface featuring modes situated in the third operating spectral window of optical communications. The optical properties of the fabricated metasurface are investigated by linear spectroscopy and numerical simulations. Our analysis allows to discern the magnetic and electric nature of the bounded modes by means of polarization-resolved reflectance measurements. Our results represent a step toward integrated nano-photonics in the telecom regime and open promising opportunities for the development of compact nonlinear optical devices.

Journal/Review: APPLIED PHYSICS LETTERS

Volume: 123 (7)      Pages from: 71701-1  to: 71701-6

More Information: A. Tognazzi acknowledges financial support from the European Union through FESR o FSE, PON Ricerca e Innovazione No. 2014-2020 – DM 1062/2021 and the University of Palermo through Fondo Finalizzato alla Ricerca di Ateneo 2023 (FFR2023). O. Takayama acknowledges financial support from the Independent Research Fund Denmark (DFF), Denmark, Research Project 2, No. 8022-00387B. The authors acknowledge the financial support from the Eur opean Community through the METAFAST project (H2020-FETOPEN-2018-2020, Grant Agreement No. 899673) and Ministero Italiano dell’Istruzione (MIUR) through the METEOR project (No. PRIN-2020, 2020EY2LJT_002).
DOI: 10.1063/5.0159275

Citations: 2
data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-11-17
References taken from IsiWeb of Knowledge: (subscribers only)
Connecting to view paper tab on IsiWeb: Click here
Connecting to view citations from IsiWeb: Click here