Publication

Angular-Invariant Scattering in Metasurfaces

2025

Abstract

Metasurfaces are versatile electromagnetic structures for wave shaping, yet their angular dispersion remains underexplored. Using generalized sheet transition conditions (GSTCs), we analyze metasurface angular dispersion and derive conditions for angle-invariant co- and cross-polarized transmission and reflection, where amplitude, phase, or both remain unchanged with incidence angle. We reveal that nonlocality can suppress angular dispersion, enabling complete angle-invariant scattering. Additionally, we show that pseudochiral metasurfaces can achieve efficient extrinsic chirality in a partially angle-invariant manner. These results provide a strategy to mitigate angular-dependent scattering, essential for applications sensitive to dispersion effects.

Official source

https://infoscience.epfl.ch/entities/publication/c9e7542e-7f02-4bbc-9ade-f22d02fb9e1d

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2025

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/c9e7542e-7f02-4bbc-9ade-f22d02fb9e1d

About this result

Related concepts (32)

Metamaterial

A metamaterial (from the Greek word μετά meta, meaning "beyond" or "after", and the Latin word materia, meaning "matter" or "material") is any material engineered to have a property that is rarely observed in naturally occurring materials. They are made from assemblies of multiple elements fashioned from composite materials such as metals and plastics. These materials are usually arranged in repeating patterns, at scales that are smaller than the wavelengths of the phenomena they influence.

Polarization (physics)

Polarization (also polarisation) is a property of transverse waves which specifies the geometrical orientation of the oscillations. In a transverse wave, the direction of the oscillation is perpendicular to the direction of motion of the wave. A simple example of a polarized transverse wave is vibrations traveling along a taut string (see image); for example, in a musical instrument like a guitar string. Depending on how the string is plucked, the vibrations can be in a vertical direction, horizontal direction, or at any angle perpendicular to the string.

Circular polarization

In electrodynamics, circular polarization of an electromagnetic wave is a polarization state in which, at each point, the electromagnetic field of the wave has a constant magnitude and is rotating at a constant rate in a plane perpendicular to the direction of the wave. In electrodynamics, the strength and direction of an electric field is defined by its electric field vector. In the case of a circularly polarized wave, the tip of the electric field vector, at a given point in space, relates to the phase of the light as it travels through time and space.

Related publications (1)

Angular-Invariant Scattering in Metasurfaces

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