Focusing by Plano-Concave lens using Negative Refraction

Abstract

We demonstrate focusing of a plane microwave by a plano-concave lens fabricated from a photonic crystal (PhC) having negative refractive index and left-handed electromagnetic properties. An inverse experiment, in which a plane wave is produced from a source placed at the focal point of the lens is also reported. A frequency dependent negative refractive index, is obtained for the lens from the experimental data which matches well with that determined from band structure calculations.

References in corpus (3)

• Refraction at Media with Negative Refractive Index
• Negative Refraction and Left-handed electromagnetism in Microwave Photonic Crystals
• Microwave photonic crystal with tailor-made negative refractive index

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• Enhanced Photocurrent Efficiency of a Carbon Nanotube Electromagnetically Coupled to a Photonic Structure
• Metacoatings for wavelength scale, high NA plano-concave focusing lenses
• Catastrophe optics of caustics in single and bilayer graphene: fine structure of caustics
• Nanoengineering of a Negative-Index Binary-Staircase Lens for the Optics Regime