Transition between metamaterial and photonic-crystal behavior in arrays of dielectric rods

0439414 - FZÚ 2015 RIV US eng J - Journal Article
Dominec, Filip - Kadlec, Christelle - Němec, Hynek - Kužel, Petr - Kadlec, Filip
Transition between metamaterial and photonic-crystal behavior in arrays of dielectric rods.
Optics Express. Roč. 22, č. 25 (2014), s. 30492-30503. ISSN 1094-4087
R&D Projects: GA ČR(CZ) GA14-25639S
Institutional support: RVO:68378271
Keywords : metamaterials * photonic crystals * negative refractive index * dielectrics
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 3.488, year: 2014

Using finite-difference time-domain simulations, we study the interactions of electromagnetic radiation with a square array of dielectric rods parallel to the electric vector. We observe the electric and magnetic Mie resonances which induce intervals of negative effective permittivity and permeability and which contribute to the formation of the photonic band gaps. Owing to the interplay of these phenomena, a narrow spectral range with a negative refractive index can occur. However, this requires the filling fraction of the dielectric to fall into a well defined interval of values and its permittivity to exceed a minimum of about 50. We discuss these phenomena from the perspective of both photonic crystal and metamaterial concepts.
Permanent Link: http://hdl.handle.net/11104/0242733