preview

E & C Department, Indian Institute Of Technology Roorkee

Better Essays
Open Document

Metamaterial Cloaking

Soumay Gupta1 and Tanvi Sharma1
14116067 14116070

1 E&C Department, Indian Institute of Technology Roorkee

Abstract

Metamaterials have been a subject of increasing interest due to their ability to manipulate the flow of EM waves. We analyse the mechanism by which metamaterials are able to exhibit this property which is exploited to develop the Harry Potter-esque invisibility cloaks. We briefly discuss the whole new branch of optics called “Transformation Optics” developed for this purpose, and comment on the extent to which these materials can cloak.

Introduction

Metamaterials are artificially designed materials which have properties that cannot be found in natural materials.[1] They were first theoretically proposed by Veselago in 1968 as materials having negative permeability and permittivity. This is why these are also known as Left Handed Materials (LHM) or Negative Refractive Index materials (NIM). The first discovery in this domain was done by Sir Pendry et al in 1996, who discovered a wire medium with negative permittivity. This was followed by other significant discoveries like negative permeability by Pendry in 1999 and LHM by Sir Smith in 2001.

Metamaterial structures can either be periodic (homogenous) or non-periodic (inhomogenous). Their properties depend on the construction and arrangement of their constituents. These con- stituents are usually smaller

Get Access
Related
Get Access