2007•Journal of NanophotonicsOpen access

Experimental study of subwavelength focusing by left-handed metamaterials with a negative refractive index

Ekmel Özbay

Abstract

Two dimensional (2D) left-handed metamaterials (LHM) exhibiting negative refraction and subwavelength imaging are studied experimentally. A left-handed transmission band is observed at the frequencies where both dielectric permittivity and magnetic permeability are simultaneously negative. 2D LHM structure is verified to have a negative refractive index by measuring the refraction through a prism-shaped sample. Subwavelength focusing is observed by using a flat LHM superlens.

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Key concepts: Negative refraction, Metamaterial, Superlens, Refractive index, Optics, Permittivity, Left handed, Photonic metamaterial