Light-opals interaction modeling by direct numerical solution of Maxwell's equations

verfasst von

Alessandro Vaccari, Antonino Calà Lesina, Luca Cristoforetti, Andrea Chiappini, Luigi Crema, Lucia Calliari, Lora Ramunno, Pierre Berini, Maurizio Ferrari

Abstract

This work describes a 3-D Finite-Difference Time-Domain (FDTD) computational approach for the optical characterization of an opal photonic crystal. To fully validate the approach we compare the computed transmittance of a crystal model with the transmittance of an actual crystal sample, as measured over the 400 ÷ 750 nm wavelength range. The opal photonic crystal considered has a face-centered cubic (FCC) lattice structure of spherical particles made of polystyrene (a non-absorptive material with constant relative dielectric permittivity). Light-matter interaction is described by numerically solving Maxwell's equations via a parallelized FDTD code. Periodic boundary conditions (PBCs) at the outer edges of the crystal are used to effectively enforce an infinite lateral extension of the sample. A method to study the propagating Bloch modes inside the crystal bulk is also proposed, which allows the reconstruction of the ω-k dispersion curve for k sweeping discretely the Brillouin zone of the crystal.

Externe Organisation(en)

Fondazione Bruno Kessler
University of Ottawa
Provincia Autonoma di Trento
Consiglio Nazionale delle Ricerche (CNR)

Typ

Artikel

Journal

Optics express

Band

22

Seiten

27739-27749

Anzahl der Seiten

11

ISSN

1094-4087

Publikationsdatum

31.10.2014

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Atom- und Molekularphysik sowie Optik

Elektronische Version(en)

https://doi.org/10.1364/OE.22.027739 (Zugang: Unbekannt)