Metasurface-based anti-reflection coatings at optical frequencies. (16th April 2018)

• Record Type: Journal Article
• Authors: Monti, Alessio; Alù, Andrea; Toscano, Alessandro; Bilotti, Filiberto
• Is Part Of: Journal of optics. Volume 20:Number 5(2018:May)
• Publication Date: 2018-04-16
• Subjects: nanoparticles -- optical metasurfaces -- anti-reflection coatings -- optical reflections; Optics -- Periodicals; 535.05
• DOI: 10.1088/2040-8986/aab886
• Languages: English
• ISSNs: 2040-8978

Abstract

Abstract: In this manuscript, we propose a metasurface approach for the reduction of electromagnetic reflection from an arbitrary air−dielectric interface. The proposed technique exploits the exotic optical response of plasmonic nanoparticles to achieve complete cancellation of the field reflected by a dielectric substrate by means of destructive interference. Differently from other, earlier anti-reflection approaches based on nanoparticles, our design scheme is supported by a simple transmission-line formulation that allows a closed-form characterization of the anti-reflection performance of a nanoparticle array. Furthermore, since the working principle of the proposed devices relies on an average effect that does not critically depend on the array geometry, our approach enables low-cost production and easy scalability to large sizes. Our theoretical considerations are supported by full-wave simulations confirming the effectiveness of this design principle.