A multifunctional ultrathin flexible bianisotropic metasurface with miniaturized cell size

Abstract

In this paper, a flexible bianisotropic metasurface possessing omega-type coupling is presented. The designed metasurface behaves differently when excited from either forward (port 1) or back (port 2) sides. It provides an absorption of 99.46% at 15.1 Gigahertz (GHz), when illuminated from port 1, whereas, on simultaneous illumination from port 2, it behaves like a partially reflective surface (PRS). Furthermore, the presented metasurface not only acts as an in-band absorptive surface (port 1) and partially reflective surface (port 2), but it also provides 97% out-of-band transmission at 7.8 GHz. The response of the presented metasurface remains the same for both transverse Electric (TE) and transverse magnetic (TM) polarized wave or any arbitrary linearly polarized wave. Additionally, the response of the metasurface is angularly stable for any oblique incidence up to 45º. The proposed ultrathin flexible metasurface with absorption, partial reflection and out-of-band transmission properties can be used in the Fabry Perrot cavity antenna for gain enhancement with radar cross-section (RCS) reduction both for passband and stop-band filtering, and conformal antenna applications.

Emulating bianisotropic coupling through coherent illumination

“…In (d), the additional 180 • phase difference results in a constructive interference in the difference scattering, as there is no sum component. meta-atoms [25][26][27][28][29]. While the -particle topology offers an intuitive understanding of its interaction with the electromagnetic fields, the latter topology is preferred due to its ease of fabrication.…”

Flexible Conformal Multifunctional Time‐Varying Phase‐Modulated Metasurface with Polarization Control for Radar Feature Transformation

“…[10,11] As an essential component, flexible metasurfaces have also attracted great interest. [12][13][14][15] Various forms of conformal metasurfaces have been proposed. [16][17][18] However, most of the current conformal reflective metasurfaces are passive structures.…”

Biobased and Programmable Electroadhesive Metasurfaces

“…Metasurfaces based on EM modulation can be made self-reconfigurable, patterned for surface-enhanced Raman spectroscopy, and provide biomolecular sensing at the interface between chiral and hyperbolic metamaterials . One of the advantages of flexible metasurfaces is the miniaturization of the “hard” metamaterial cells because of the shape adaptability offered by ultrathin architected metallic substrates . Metasurfaces are a critical design paradigm to harness functionalities in nonlinear optical metamaterials .…”

“…32 One of the advantages of flexible metasurfaces is the miniaturization of the "hard" metamaterial cells because of the shape adaptability offered by ultrathin architected metallic substrates. 33 Metasurfaces are a critical design paradigm to harness functionalities in nonlinear optical metamaterials. 34 The propagation of mechanical and acoustic waves can also be tailored using patterned and elastic substrates.…”