Details
| Original language | English |
|---|---|
| Pages (from-to) | 27739-27749 |
| Number of pages | 11 |
| Journal | Optics express |
| Volume | 22 |
| Issue number | 22 |
| Publication status | Published - 31 Oct 2014 |
| Externally published | Yes |
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.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
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In: Optics express, Vol. 22, No. 22, 31.10.2014, p. 27739-27749.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Light-opals interaction modeling by direct numerical solution of Maxwell's equations
AU - Vaccari, Alessandro
AU - Lesina, Antonino Calà
AU - Cristoforetti, Luca
AU - Chiappini, Andrea
AU - Crema, Luigi
AU - Calliari, Lucia
AU - Ramunno, Lora
AU - Berini, Pierre
AU - Ferrari, Maurizio
PY - 2014/10/31
Y1 - 2014/10/31
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84920024764&partnerID=8YFLogxK
U2 - 10.1364/OE.22.027739
DO - 10.1364/OE.22.027739
M3 - Article
AN - SCOPUS:84920024764
VL - 22
SP - 27739
EP - 27749
JO - Optics express
JF - Optics express
SN - 1094-4087
IS - 22
ER -