invisibility

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.
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Great strides are being made, when it comes to creating invisibility.

Baile Zhang, a scientist from Nanyang Technological University in Singapore, caused his audience to gasp when he demonstrated the following experiment: He used a small box made of calcite optical crystal to bend light around an object, making anything placed behind the box invisible to people watching the demonstration

The March 1st edition of the Telegraph quotes Zhang as saying he created the device "just for fun. I just think the idea is cool. Plus, I hope this work will demonstrate that simple tools can sometimes fulfill important functions that previously required complicated methods.
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Scientists are working hard to achieve invisibility. A group of researchers have created a cylinder which makes its contents invisible to magnetic fields.

If there’s a military use for this, nobody’s thought of it yet, but there are definitely medical applications. For instance, in the future, similar devices could serve to protect a pacemaker in a patient (so he or she wouldn’t need to stay away from restaurants with microwaves).
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