A Physical Explanation of Angle-Independent Reflection and Transmission Properties of Metafilms/Metasurfaces

Published

September 29, 2009

Author(s)

Christopher L. Holloway, Joshua A. Gordon, Andrew M. Dienstfrey

Abstract

In this letter we illustrate that a metafilm (the two-dimensional equivalent of a metamaterial; also referred to as metasurface) can be designed to have transmission and reflection properties that are independent of the angle of the incident wave. We show theoretically and discuss physically why this behavior occurs in certain metafilms. We show that by choosing an inclusion with sufficiently strong resonances the angle independence of the metafilm becomes negligible. Metafilms operating at microwave frequencies and constructed from both lossless and lossy resonant spherical inclusions as well as lossless electrical resonators are investigated. Numerical and spherical harmonic mode matching approaches are used to investigate the angular dependence of the reflection properties of these metafilms. Such metafilms can have applications in extending the modes supported in a metafilm waveguide as well as applications in optical metafilms.

Citation

IEEE Antennas and Wireless Propagation Letters

Volume

8

Pub Type

Journals

Download Paper

https://doi.org/10.1109/LAWP.2009.2033216

Keywords

Brewster angle, generalized sheet transition conditions (GSTC), metafilm, metamaterial, metasurface, reflection coefficient, surface susceptibility.

Citation

Holloway, C. , Gordon, J. and Dienstfrey, A. (2009), A Physical Explanation of Angle-Independent Reflection and Transmission Properties of Metafilms/Metasurfaces, IEEE Antennas and Wireless Propagation Letters, [online], https://doi.org/10.1109/LAWP.2009.2033216 (Accessed March 13, 2025)