Search
Aug 2, 2012Science and Technology
'Extraordinarily strong' negative refraction metamaterials

Electromagnetic waves get small -- really small -- but they still can’t get small enough for researchers at Harvard University and Weizmann Institute of Science in Israel. For two decades scientists have created artificial metamaterials with negative refractive-indices that bend light "wrong" direction”, shrinking electromagnetic waves seemingly impossible sub-wavelength scales. The potential for such materials are great, ranging from cloaking objects from view to hyper-small photonics circuits and communications. Thanks to the Harvard-Weizmann, now metamaterials are more advanced than ever. By simply switching focus on how the material functions -- from magnetic inductance to kinetic inductance --  the team created a metamaterial with an "extraordinarily strong" negative index of -700. That’s 100 times greater than any previously reported index. While the researcher as still investigating alternative methods, for now, the material only operates at temperatures below 20 degrees Kelvin.

Share
Be the first to comment.
Menu