A simple route to a tunable electromagnetic gateway

Abstract

Transformation optics is used to design a gateway that can block electromagnetic waves but allows the passage of other entities. Our conceptual device has the advantage that it can be realized with simple materials and structural parameters and can have a reasonably wide bandwidth. In particular, we show that our system can be implemented by using a magnetic photonic crystal structure that employs a square ray of ferrite rods, and as the field response of ferrites can be tuned by external magnetic fields, we end up with an electromagnetic gateway that can be open or shut using external fields. The functionality is also robust against the positional disorder of the rods that made up the photonic crystal.

14 pages, 8 figures

References in corpus (6)

• Design of Electromagnetic Cloaks and Concentrators Using Form-Invariant Coordinate Transformations of Maxwell's Equations
• Transformation media that rotate electromagnetic fields
• Electromagnetic wormholes and virtual magnetic monopoles
• A metamaterial frequency-selective super-absorber that has absorbing cross section significantly bigger than the geometric cross section
• Generalized transformation optics from triple spacetime metamaterials
• Transformation media that turn a narrow slit into a large window