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Angular shaping of fluorescence from synthetic opal-based photonic crystal.

Boiko V, Dovbeshko G, Dolgov L, Kiisk V, Sildos I, Loot A, Gorelik V - Nanoscale Res Lett (2015)

Bottom Line: 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.

View Article: PubMed Central - PubMed

Affiliation: Department of Physics of Biological System, Institute of Physics, NAS of Ukraine, Prospect Nauki 46, Kyiv, 03680 Ukraine.

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.

No MeSH data available.


Light reflectance spectra for sample 2 measured at the angles 10° and 20°.
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Fig6: Light reflectance spectra for sample 2 measured at the angles 10° and 20°.

Mentions: For the sample 2, we have λ1 = 512 nm, θ1 = 10° and λ2 = 500 nm, θ2 = 20° (Figure 6) yielding D = 230 nm and neff = 1.38.Figure 6


Angular shaping of fluorescence from synthetic opal-based photonic crystal.

Boiko V, Dovbeshko G, Dolgov L, Kiisk V, Sildos I, Loot A, Gorelik V - Nanoscale Res Lett (2015)

Light reflectance spectra for sample 2 measured at the angles 10° and 20°.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4385143&req=5

Fig6: Light reflectance spectra for sample 2 measured at the angles 10° and 20°.
Mentions: For the sample 2, we have λ1 = 512 nm, θ1 = 10° and λ2 = 500 nm, θ2 = 20° (Figure 6) yielding D = 230 nm and neff = 1.38.Figure 6

Bottom Line: 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.

View Article: PubMed Central - PubMed

Affiliation: Department of Physics of Biological System, Institute of Physics, NAS of Ukraine, Prospect Nauki 46, Kyiv, 03680 Ukraine.

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.

No MeSH data available.