Negative refraction by photonic crystals

Ertugrul Cubukcu (), Koray Aydin, Ekmel Ozbay, Stavroula Foteinopoulou and Costas M. Soukoulis
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Ertugrul Cubukcu: Bilkent University
Koray Aydin: Bilkent University
Ekmel Ozbay: Bilkent University
Stavroula Foteinopoulou: Ames Laboratory, Iowa State University
Costas M. Soukoulis: Ames Laboratory, Iowa State University

Nature, 2003, vol. 423, issue 6940, 604-605

Abstract: Abstract Materials that can bend light in the opposite direction to normal ('left-handed' materials) reverse the way in which refraction usually works — this negative refractive index is due to simultaneously negative permeability and permittivity1,2,3. Here we demonstrate negative refraction of electromagnetic waves in a two-dimensional dielectric photonic crystal that has a periodically modulated positive permittivity and a permeability of unity4,5,6. This experimental verification of negative refraction is a step towards the realization of a 'superlens' that will be able to focus features smaller than the wavelength of light.

Date: 2003
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DOI: 10.1038/423604b

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