Microwave focusing
US researchers have focused a plane microwave by a plano-concave lens fabricated from a photonic crystal specially designed to have negative refractive index and left-handed electro-magnetic properties.
Researchers at
today announced that they have been able to demonstrate focusing of a plane microwave by a plano-concave lens fabricated from a photonic crystal (PhC) specially designed to have negative refractive index and left-handed electro-magnetic properties.
The Northeastern researchers also performed an inverse experiment in which a plane wave is produced from a source placed at the focal point of the lens.
The research, supported by the US National Science Foundation and the Air Force Research Laboratories, represents an important advance in the field of imaging and will be published in the May 16th edition of Applied Physics Letters.
The authors of the article “Focusing by Plano-Concave Lens Using Negative Refraction” are Plarenta Vodo, Patanjali Parimi, PhD, Wentao Lu, PhD, and Srinivas Sridhar, PhD, from the department of physics and the Electronic Materials Research Institute at
“Negative refraction in left-handed materials has triggered intense interest in designing novel microwave and optical elements. In 2003, we demonstrated imaging by a flat lens for the first time,” said Sridhar.
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