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

0439414 - FZÚ 2015 RIV US eng J - Článek v odborném periodiku
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
Grant CEP: GA ČR(CZ) GA14-25639S
Institucionální podpora: RVO:68378271
Klíčová slova: metamaterials * photonic crystals * negative refractive index * dielectrics
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 3.488, rok: 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.
Trvalý link: http://hdl.handle.net/11104/0242733