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HL: Fachverband Halbleiterphysik
HL 44: Photonic crystals
HL 44.5: Vortrag
Dienstag, 12. März 2013, 16:00–16:15, H3
Angle-Resolved Spectroscopy of Opal Films and Higher Brillion Zones — •Frank Marlow1,2, Mulda Muldarisnur1, and Iulian Popa1 — 1MPI für Kohlenforschung, 45470 Mülheim an der Ruhr — 2Center for Nanointegration Duisburg-Essen (CENIDE), University Duisburg-Essen
The angular behavior of light transmission through opal films over a broad range of wavelengths and angles was investigated. The opal films were prepared using the capillary deposition method (CDM). Many well-defined diffraction peaks were detected and indicate that the CDM results in opal films with very high quality. Peaks coinciding at normal incidence split when the samples are rotated. The angular shift of these peaks was found to fit very well with the kinematical diffraction theory. Furthermore, the variation of intensity with incident angle can be interpreted in terms of a simplified dynamical diffraction theory considering the photonic bandstructure of the opals. The behavior at higher Brillion zones turns out to be the key for the interpretation.