Dichroic Dual-Angle Refractor: Multi-Cell Huygens' Metasurface-Based Circuit Approximation

TL;DR

This paper presents a novel dichroic dual-angle refractor design using a 2D Huygens' metasurface model, employing resonant-circuit approximations to optimize refraction angles and analyze aberrations for improved optical performance.

Contribution

It introduces a new dual-angle refractor design based on Huygens' metasurfaces with a comprehensive analysis of refraction angles and aberrations using circuit approximations.

Findings

Potential to synthesize a rectangular array of cells based on diffraction limits

Optimal refraction angles can be guided by analytic approximations

Aberrations are linked to approximation limitations

Abstract

A dichroic dual-angle refractor based on a 2D Huygens' metasurface model is treated by means of resonant-circuit approximations of multiple cells. The whole parameter space of refraction angles is tested for the analytic approximations involved, whereas the realised refraction guides the choice of optimal such angles. Our results indicate the possibility of sythesising a rectangular array of a number of cells which eventually depends on the low-frequency band diffraction limit. Aberrations from the ideal performance are also examined and attributed to certain approximation caveats.