Photoluminescence of single colour defects in 50nm diamond nanocrystals

We used optical confocal microscopy to study optical properties of diamond 50nm nanocrystals first irradiated with an electron beam, then dispersed as a colloidal solution and finally deposited on a silica slide. At room temperature, under CW laser excitation at a wavelength of 514.5nm we observed p...

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Bibliographic Details
Published inPhysica. B, Condensed matter Vol. 376-377; pp. 926 - 929
Main Authors Treussart, F., Jacques, V., Wu, E., Gacoin, T., Grangier, P., Roch, J.-F.
Format Journal Article
LanguageEnglish
Published 01.04.2006
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Summary:We used optical confocal microscopy to study optical properties of diamond 50nm nanocrystals first irradiated with an electron beam, then dispersed as a colloidal solution and finally deposited on a silica slide. At room temperature, under CW laser excitation at a wavelength of 514.5nm we observed perfectly photostable single nitrogen-vacancy (NV) colour defects embedded in the nanocrystals. From the zero-phonon line around 575nm in the spectrum of emitted light, we infer a neutral NV0 type of defect. Such nanoparticle with intrinsic fluorescence are highly promising for applications in biology where long-term emitting fluorescent bio-compatible nanoprobes are still missing.
Bibliography:ObjectType-Article-2
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ISSN:0921-4526
DOI:10.1016/j.physb.2005.12.232