Susceptibility synthesis of arbitrary shaped metasurfaces

Abstract

Visual perception relies on light scattering at the object's surface in the direction of observation. By engineering the surface scattering properties, it is possible to realize arbitrary visual percept. Here, we address theoretically this problem of electromagnetic field transition conditions at conformal interfaces to achieve surface topography-dependent transmitted and reflected fields. Our analysis, supported by two-and three-dimensional finite element simulations, provides a solid theoretical framework to design metasurfaces for cloaking, wearable optics and next generation of freeform imaging systems.

Homogenized transition conditions for plasmonic metasurfaces

“…11. Note that, for curved meta- surfaces, the solution to the effective problem has to be solved numerically as the translational invariance along the equivalent interface has been lost; to do this, the GSTCs were implemented in COMSOL MULTIPHYSICS following [24,42]. The agreement is good, which confirms that the extension of the model for a curved interface holds for resonant metasurfaces (in the reported case, we have d/|R| < 0.7).…”

Optimization of plasmonic metasurfaces: A homogenization-based design

“…In this last example, we consider a curved metasurface (such a system could be considered for instance in cloaking applications where a shape is coated with a microstructure [34]) for which the GSTC are changed into locally curved coordinates by changing the ∂ y into normal derivatives and the ∂ x by tangential ones (see [36] for more details about the FEM implementation). The interface Γ is defined via: Our goal is to design the meta-atoms distributions such that the curved metasurface act as a lens when an incident plane wave is sent from the left of the domain.…”