Work

Corrugated silicon metasurface optimized within the Rayleigh hypothesis for anomalous refraction at large angles

Year: 2019

Type: article

Abstract: We optimize the performance of optical metasurfaces based on periodically corrugated silicon layers by adjusting the Fourier coefficients of their surface profiles. For smooth corrugations, we demonstrate the excellent quantitative accuracy of a semi-analytical approach based on the Rayleigh hypothesis. We employ this approach to design metasurfaces with anomalous refraction due to dominant first-order diffraction. Unlike conventional Huygens’ dielectric metasurfaces, corrugated silicon layers are capable of efficient anomalous refraction in near-grazing directions: we obtain corrugation shapes allowing us to deflect 70%–80% of the energy of normally incident green light into the range of 68°–85° of angles with respect to the normal.

Source: Journal of the Optical Society of America B

DOI: 10.1364/josab.36.002118

Authors: Alexander A. Antonov, Maxim V. Gorkunov

Institutions: Russian Academy of Sciences, A.V. Shubnikov Institute of Crystallography, Federal Scientific Research Centre Crystallography and Photonics

Language: English

Topic: Metamaterials and Metasurfaces Applications

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funder: Russian Science Foundation

Award: G965984043