Manipulation of the fluorescence of nanocrystals by opal-based heterostructures

Abstract : Opal-based photonic crystals are promising materials to engineer complex heterostructures for efficient manipulation of nano-emitters fluorescence. We fabricated and characterized a structure composed of a layer of silica embedded between two silica opals. Thanks to this controlled planar defect which opens a permitted frequency band in the photonic stopband, an increase of emission, depending on angular distribution, is evidenced through photoluminescence spectroscopy. We discuss the use of such a structure as a self-assembled micrometer-sized spectroscopic device and demonstrate that it can be used to point the maximum emission wavelength of an unknown light source up to a certain linewidth. It can as well separate two sources, emitting at different wavelengths, with a resolution given by the Rayleigh criterion.
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Bourdillon Céline, Hong Phan Ngoc, Daney de Marcillac Willy, Coolen Laurent, Agnès Maître, et al.. Manipulation of the fluorescence of nanocrystals by opal-based heterostructures. Journal of Materials Chemistry C, Royal Society of Chemistry, 2015, 3 (37), pp.9734-9739 ⟨10.1039/C5TC01829C⟩. ⟨hal-01203465⟩

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