Invisibility cloaking is no longer the stuff of science
fiction: two researchers in The Edward S. Rogers Sr. Department of Electrical
& Computer Engineering have demonstrated an effective invisibility cloak
that is thin, scalable and adaptive to different types and sizes of objects.
Professor George Eleftheriades and PhD student Michael
Selvanayagam have designed and tested a new approach to cloaking—by surrounding
an object with small antennas that collectively radiate an electromagnetic
field. The radiated field cancels out any waves scattering off the cloaked
object. Their paper ‘Experimental demonstration of active electromagnetic
cloaking’ appears today in the journal Physical Review X.