Washington, August 9 (ANI): An undergraduate student of physics at the University of St. Andrews has worked out how invisibility cloaks can be designed without the requirement of superluminal (faster-than-light) propagation within them.
Janos Perczel has added an optical device into his design that not only remains invisible itself, but also has the ability to slow down light.
This new research could open up the possibility for a potential invisibility cloak wearer to move around amongst ever-changing backgrounds of a variety of colours.
By slowing all of the light down with an invisible sphere, it does not need to be accelerated to such high speeds and can therefore work in all parts of the spectrum.
Perczel said, "I started to work on the problem of superluminal propagation as Professor Leonhardt's summer student with an EPSRC grant. Once the idea was present, I worked for over eight months to overcome the technical barriers and to make the proposal practicable."
An Institute of Physics spokesperson said, "This new development opens up further possibilities for the design of a practical invisibility cloak, overcoming the problem of light speed that other advances have struggled to address."
The study was recently published in the Institute of Physics and German Physical Society's New Journal of Physics. (ANI)
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