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

P. Franceschini, A. Tognazzi*, G. Finco, L. Carletti, I. Alessandri, A. C. Cino, C. De Angelis, O. Takayama, R. Malureanu, A. V. Lavrinenko, D. de Ceglia

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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.
Original languageEnglish
Article number071701
JournalApplied Physics Letters
Volume123
Issue number7
Number of pages7
ISSN0003-6951
DOIs
Publication statusPublished - 2023

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