Photonic band structure and effective medium properties of doubly-resonant core-shell metallo-dielectric nanowire arrays: low-loss, isotropic optical negative-index behavior

We investigate theoretically and numerically the photonic band structure in the optical domain of an array of core-shell metal-semiconductor nanowires. Corresponding negative-index photonic bands are calculated, showing isotropic equifrequency surfaces. The effective (negative) electric permittivity...

Full description

Saved in:
Bibliographic Details
Published in:Journal of Optics 2015-12, Vol.17 (12), p.125104-13
Main Authors: Abujetas, D R, Paniagua-Domínguez, R, Nieto-Vesperinas, M, Sánchez-Gil, J A
Format: Article
Language:English
Subjects:
Arrays
Band structure of solids
Disorders
Focusing
magnetic light
Magnetic permeability
Metamaterials
Nanowires
negative index metamaterials
photonic crystals
Photonics
plasmonics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We investigate theoretically and numerically the photonic band structure in the optical domain of an array of core-shell metal-semiconductor nanowires. Corresponding negative-index photonic bands are calculated, showing isotropic equifrequency surfaces. The effective (negative) electric permittivity and magnetic permeability, retrieved from S-parameters, are used to compare the performance of such nanowire arrays with homogeneous media in canonical examples, such as refraction through a prism and flat-lens focusing. Very good agreement is found, confirming the effective medium behavior of the nanowire array as a low-loss, isotropic (2D) and bulk, optical negative index metamaterial. Indeed, disorder is introduced to further stress its robustness.
ISSN:2040-8978
2040-8986
1464-4258
DOI:10.1088/2040-8978/17/12/125104