Guided resonances in photonic crystals with point-defected aperiodically-ordered supercells.
Opt Express
; 17(22): 19586-98, 2009 Oct 26.
Article
en En
| MEDLINE
| ID: mdl-19997178
ABSTRACT
In this paper, we study the excitation of guided resonances (GRs) in photonic-crystal slabs based on point-defected aperiodically-ordered supercells. With specific reference to perforated-slab structures and the Ammann-Beenker octagonal lattice geometry, we carry out full-wave numerical studies of the plane-wave responses and of the underlying modal structures, which illustrate the representative effects induced by the introduction of symmetry-preserving and symmetry-breaking defects. Our results demonstrate that breaking the supercell mirror symmetries via the judicious introduction of point-defects enables for the excitation of otherwise uncoupled GRs, with control on the symmetry properties of their field distributions, thereby constituting an attractive alternative to those GR-engineering approaches based on the asymmetrization of the hole shape. In this framework, aperiodically-ordered supercells seem to be inherently suited, in view of the variety of inequivalent defect sites that they can offer.
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Banco de datos:
MEDLINE
Asunto principal:
Refractometría
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Cristalización
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Materiales Manufacturados
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Modelos Teóricos
Idioma:
En
Año:
2009
Tipo del documento:
Article