Plasmonic and Metamaterial Cloaking: Fundamental Principles, Salient Features and Future Trends

Seminar
Wednesday, March 05, 2008
6:00 PM
Free and open to the public

The quest for miniaturizing and optimizing the performance of electromagnetic devices for numerous applications (wireless and optical communications, imaging ...) has fostered in recent years a strong interest in artificial materials, metamaterials and plasmonics, whose exciting and anomalous electromagnetic properties may overcome certain limitations of the current technologies. One of the most striking properties of these materials is the possibility of drastically reducing the visibility (electromagnetic scattering) of an object.

In this talk, I will provide an overview of our original technique that employs metamaterials and plasmonic layers to envision efficient cloaks. After giving an overview of the current state of the art in the fields of metamaterials and plasmonics, I will show how the visibility of an object may be drastically reduced by surrounding it with suitably designed metamaterial and/or plasmonic cloaks.

These concepts are applied to dielectric and conducting objects, multiple particles, multi-frequency operation, realistic loss and frequency dispersion, and presence of reflectors and other objects. I will discuss several potential applications of these cloaks, from camouflaging and scattering reduction to non-invasive probing and efficient energy extraction, spanning frequencies that go from the microwaves to the visible.

x x

Speaker

Andrea Alu

Andrea Alu

Associate Professor
UT ECE

Andrea Alù is an Associate Professor in the Electrical & Computer Engineering department at The University of Texas at Austin and holds the David & Doris Lybarger Endowed Faculty Fellowship in Engineering.