Invisibility cloak without singularity

Abstract

An elliptical invisible cloak is proposed using a coordinate transformation in the elliptical-cylindrical coordinate system, which crushes the cloaked object to a line segment instead of a point. The elliptical cloak is reduced to a nearly-circular cloak if the elliptical focus becomes very small. The advantage of the proposed invisibility cloak is that none of the parameters is singular and the changing range of all parameters is relatively small.

to appear in Appl. Phys. Lett

References in corpus (4)

• Optical Cloaking with Non-Magnetic Metamaterials
• Full-wave simulations of electromagnetic cloaking structures
• Calculation of material properties and ray tracing in transformation media
• Confirmation of Cylindrical Perfect Invisibility Cloak Using Fourier-Bessel Analysis

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• Dielectric Optical Cloak
• A Carpet Cloak Device for Visible Light
• A Rigorous Analysis of Plane-transformed Invisibility Cloaks
• A near-perfect invisibility cloak constructed with homogeneous materials
• Nonsingular two dimensional cloak of arbitrary shape
• Tunable scattering cancellation cloak with plasmonic ellipsoids in the visible
• A class of line-transformed cloaks with easily-realizable constitutive parameters
• Controlling surface plasmon polaritons in transformed coordinates
• Non-singular cloaks allow mimesis
• Electromagnetic analysis of arbitrarily shaped pinched carpets