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Observation of Zeroth-Order Band Gaps in Negative-Refraction Photonic Crystal Superlattices at Near-Infrared Frequencies.
PHYS REV LETT
, Article 203905. 10.1103/PhysRevLett.102.203905.
We present the first observations of zero-n over bar band gaps in photonic crystal superlattices consisting of alternating stacks of negative-index photonic crystals and positive-index dielectric materials in the near-infrared range. Guided by ab initio three-dimensional numerical simulations, the fabricated nanostructured superlattices demonstrate the presence of zeroth-order gaps in remarkable agreement with theoretical predictions across a range of different superlattice periods and unit cell variations. These volume-averaged zero-index superlattice structures present a new type of photonic band gap, with the potential for complete wave front control for arbitrary phase delay lines and open cavity resonances.
|Title:||Observation of Zeroth-Order Band Gaps in Negative-Refraction Photonic Crystal Superlattices at Near-Infrared Frequencies|
|Open access status:||An open access version is available from UCL Discovery|
|Additional information:||© 2009 The American Physical Society|
|Keywords:||EXPERIMENTAL-VERIFICATION, HANDED MATERIALS, INDEX, METAMATERIALS, LIGHT, PERMEABILITY, PROPAGATION, SUPERLENS|
|UCL classification:||UCL > School of BEAMS
UCL > School of BEAMS > Faculty of Engineering Science
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