title: Angular shaping of fluorescence from synthetic opal-based photonic crystal.
abstract: Spectral, angular, and temporal distributions of fluorescence as well as specular reflection were investigated for silica-based artificial opals. Periodic arrangement of nanosized silica globules in the opal causes a specific dip in the defect-related fluorescence spectra and a peak in the reflectance spectrum. The spectral position of the dip coincides with the photonic stop band. The latter is dependent on the size of silica globules and the angle of observation. The spectral shape and intensity of defect-related fluorescence can be controlled by variation of detection angle. Fluorescence intensity increases up to two times at the edges of the spectral dip. Partial photobleaching of fluorescence was observed. Photonic origin of the observed effects is discussed.
authors: Department of Physics of Biological System, Institute of Physics, NAS of Ukraine, Prospect Nauki 46, Kyiv, 03680 Ukraine.
authors: Vitalii
authors: V
authors: Boiko
authors: Department of Physics of Biological System, Institute of Physics, NAS of Ukraine, Prospect Nauki 46, Kyiv, 03680 Ukraine.
authors: Galyna
authors: G
authors: Dovbeshko
authors: Laboratory of Laser Spectroscopy, Institute of Physics, University of Tartu, Ravila 14c, Tartu, 50411 Estonia.
authors: Leonid
authors: L
authors: Dolgov
authors: Laboratory of Laser Spectroscopy, Institute of Physics, University of Tartu, Ravila 14c, Tartu, 50411 Estonia.
authors: Valter
authors: V
authors: Kiisk
authors: Laboratory of Laser Spectroscopy, Institute of Physics, University of Tartu, Ravila 14c, Tartu, 50411 Estonia.
authors: Ilmo
authors: I
authors: Sildos
authors: Laboratory of Laser Spectroscopy, Institute of Physics, University of Tartu, Ravila 14c, Tartu, 50411 Estonia.
authors: Ardi
authors: A
authors: Loot
authors: Raman Scattering Laboratory, P.N. Lebedev Physical Institute of the Russian Acad. Sci., Leninsky Prospect 53, Moscow, 119991 Russia.
authors: Vladimir
authors: V
authors: Gorelik
keywords: Angular dependence; Fluorescence; Photobleaching; Photonic crystal; Refractive index; Stop band; Synthetic opal