Abstract
The photonic band diagrams of close-packed colloidal diamond and pyrochlore structures, have been studied using Korringa-Kohn-Rostoker (KKR) and plane-wave calculations. In addition, the occurrence of a band gap has been investigated for the binary Laves structures and their constituent large- and small-sphere substructures. It was recently shown that these Laves structures give the possibility to fabricate the diamond and pyrochlore structures by self-organization. The comparison of the two calculation methods opens the possibility to study the validity and the convergence of the results, which have been an issue for diamond-related structures in the past. The KKR calculations systematically give a lower value for the gap width than the plane-wave calculations. This difference can partly be ascribed to a convergence issue in the plane-wave code when a contact point of two spheres coincides with the grid. (C) 2009 Optical Society of America
Original language | English |
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Pages (from-to) | 6952-6961 |
Number of pages | 10 |
Journal | Optics Express |
Volume | 17 |
Issue number | 9 |
DOIs | |
Publication status | Published - 27 Apr 2009 |
Keywords / Materials (for Non-textual outputs)
- MULTIPLE-SCATTERING THEORY
- SPONTANEOUS EMISSION
- GAPS
- POTENTIALS
- LATTICES
- SYSTEMS
- SPHERES