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Observation of Zeroth-Order Band Gaps in Negative-Refraction Photonic Crystal Superlattices at Near-Infrared Frequencies

Kocaman, S; Chatterjee, R; Panoiu, NC; McMillan, JF; Yu, MB; Osgood, RM; ... Wong, CW; + view all (2009) Observation of Zeroth-Order Band Gaps in Negative-Refraction Photonic Crystal Superlattices at Near-Infrared Frequencies. PHYS REV LETT , 102 (20) , Article 203905. 10.1103/PhysRevLett.102.203905. Green and gold open access

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Abstract

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.

Type:Article
Title:Observation of Zeroth-Order Band Gaps in Negative-Refraction Photonic Crystal Superlattices at Near-Infrared Frequencies
Open access status:An open access publication. A version is also available from UCL Discovery.
DOI:10.1103/PhysRevLett.102.203905
Publisher version:http://dx.doi.org/10.1103/PhysRevLett.102.203905
Language:English
Additional information:© 2009 The American Physical Society
Keywords:EXPERIMENTAL-VERIFICATION, HANDED MATERIALS, INDEX, METAMATERIALS, LIGHT, PERMEABILITY, PROPAGATION, SUPERLENS
UCL classification:UCL > School of BEAMS > Faculty of Engineering Science > Electronic and Electrical Engineering

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