Additional Boundary Condition for a Wire Medium Connected to a Metallic Surface

Abstract

In this work, we demonstrate that the interaction of electromagnetic waves with a microstructured material formed by metallic wires connected to a metallic surface can be described using homogenization methods provided an additional boundary condition is considered. The additional boundary condition is derived by taking into account the specific microstructure of the wire medium. To illustrate the application of the result, we characterize a substrate formed by an array of tilted metallic wires connected to a ground plane, demonstrating that in such configuration the wire medium behaves essentially as a material with extreme optical anisotropy and that in some circumstances the substrate can be seen as an impedance surface.

26 pages; under review

References in corpus (4)

• Nanowire metamaterials with extreme optical anisotropy
• Non-local effects in effective medium response of nano-layered meta-materials
• Nonlocal Homogenization Model for a Periodic Array of Epsilon-Negative Rods
• Magnification of Subwavelength Field Distributions at Microwave Frequencies Using a Wire Medium Slab Operating in the Canalization Regime

Cited by in corpus (1)

• Superlens made of a metamaterial with extreme effective parameters