Inhomogenous dielectric metamaterials with space-variant polarizability

Uriel Levy*, Maxim Abashin, Kazuhiro Ikeda, Ashok Krishnamoorthy, John Cunningham, Yeshaiahu Fainman

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

121 Scopus citations


We experimentally demonstrate for the first time the focusing of optical beams within an inhomogeneous dielectric metamaterial with space-variant polarizability, implemented by etching subwavelength structures into a Silicon slab. Light focusing is obtained by creating an artificial slab material with graded refractive index profile. The local refractive index within the slab is modulated by controlling the duty cycle of the subwavelength structures. The demonstrated metamaterial based component can be integrated with various other building blocks towards the realization of devices and systems in free space optics on a chip configuration.

Original languageAmerican English
Article number243901
JournalPhysical Review Letters
Issue number24
StatePublished - 13 Jun 2007


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