Photon upconversion (UC) is a nonlinear optical process in which long-wavelength (NIR) radiation is converted into short-wavelength (VIS) radiation. We have extended our synthetic and spectroscopic work towards Yb/sup 3+//Er/sup 3+/ codoped nanoparticles of NaGdF/sub 4/. The /spl beta/-NaGdF/sub 4/:Yb/sup 3+/, Er/sup 3+/ nanoparticles of roughly spherical shape and a size of about 30 nm can be transparently dissolved in DMSO. The UC emission spectra upon laser excitation of the transparent solution of /spl beta/-NaGdF/sub 4/:Yb/sup 3+/, Er/sup 3+/ nanoparticles in DMSO are observed.


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    Title :

    Photon upconversion emission in transparent solutions of nanocrystalline hexagonal NaGdF/sub 4/:Yb/sup 3+/, Er/sup 3+/


    Contributors:
    Aebischer, A. (author) / Heer, S. (author) / Kramer, K. (author) / Haase, M. (author) / Gudel, H.U. (author)


    Publication date :

    2005-01-01


    Size :

    180185 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English




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