Journal
JOURNAL OF OPTICS
Volume 12, Issue 10, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2040-8978/12/10/104017
Keywords
slow light; negative refractive index; metamaterials; frequency band structure; heavy photons
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Funding
- European Community [228455-NANOGOLD]
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We show theoretically that electromagnetic radiation within Mie-based metamaterials can have a negative refractive index and, at the same time, propagate with a group velocity that is of the order of 105 slower than the vacuum one. In the infrared regime, such behaviour is achieved for metamaterials made from binary superlattices of polaritonic and plasmonic microspheres, whilst in the optical regime it is demonstrated for metal-coated semiconductor nanospheres. The results presented are based on rigorous calculations of the frequency band structure of the above metamaterials obtained by the layer multiple-scattering method.
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