Magnetless reflective gyrotropic spatial isolator metasurface. (21st July 2021)

• Record Type: Journal Article
• Authors: Lavigne, Guillaume; Caloz, Christophe
• Is Part Of: New journal of physics. Volume 23:Number 7(2021)
• Publication Date: 2021-07-21
• Subjects: metasurface -- magnetless nonreciprocity -- isolation; Physics -- Periodicals; Physics; Periodicals; 530.05
• DOI: 10.1088/1367-2630/ac10d0
• Languages: English
• ISSNs: 1367-2630

Abstract

Abstract: We present the concept of a magnetless reflective gyrotropic spatial isolator (RGSI) metasurface. This is a birefringent metasurface that reflects vertically polarized incident waves into a horizontally polarized waves, and absorbs horizontally polarized incident waves, hence providing isolation between the two orthogonal polarization. We first synthesize the metasurface using surface susceptibility-based generalized sheet transition conditions. We then propose a mirror-backed metaparticle implementation of this metasurface, where transistor-loaded resonators provide the desired magnetless nonreciprocal response. Finally, we demonstrate the metasurface by full-wave simulation results. The proposed RGSI metasurface may be used in various electromagnetic applications, and may also serve as a step towards more sophisticated magnetless nonreciprocal metasurface systems.