Title :
Photon upconversion emission in transparent solutions of nanocrystalline hexagonal NaGdF4:Yb3+, Er3+
Author :
Aebischer, Annina ; Heer, Stephan ; Krämer, Karl ; Haase, Markus ; Güdel, Hans U.
Author_Institution :
Dept. of Chem. & Biochem., Bern Univ., Switzerland
Abstract :
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 Yb3+/Er3+ codoped nanoparticles of NaGdF4. The β-NaGdF4:Yb3+, Er3+ 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 β-NaGdF4:Yb3+, Er3+ nanoparticles in DMSO are observed.
Keywords :
erbium; gadolinium compounds; nanoparticles; nonlinear optics; optical materials; photoexcitation; photoluminescence; sodium compounds; ytterbium; 30 nm; DMSO; NaGdF4:Yb3+, Er3+; laser excitation; nanocrystalline hexagonal NaGdF4:Yb3+, Er3+; nanoparticles; nonlinear optical process; photon upconversion emission; synthetic materials; transparent solution; transparent solutions; upconversion emission spectra; Biochemistry; Biological materials; Biomedical optical imaging; Energy states; Erbium; Nanoparticles; Nonlinear optics; Optical materials; Organic materials; Stimulated emission;
Conference_Titel :
Lasers and Electro-Optics Europe, 2005. CLEO/Europe. 2005 Conference on
Print_ISBN :
0-7803-8974-3
DOI :
10.1109/CLEOE.2005.1568071
