# Angle-Independent Nongyrotropic Metasurfaces

## TL;DR

This paper derives conditions for angle-independent bianisotropic nongyrotropic metasurfaces and demonstrates their applications as an absorber/amplifier and a spatial gyrator, enabling angle-insensitive electromagnetic control.

## Contribution

It provides a general condition for designing angle-independent nongyrotropic metasurfaces and presents two novel applications demonstrating their practical utility.

## Key findings

- Derived a general condition for angle-independent metasurfaces.
- Designed an angle-independent absorber/amplifier.
- Developed an angle-independent spatial gyrator.

## Abstract

We derive a general condition for angle-independent bianisotropic nongyrotropic metasurfaces and present two applications corresponding to particular cases: an angle-independent absorber/amplifier and an angle-independent spatial gyrator.