TITLE

Conversion of infrared radiation into red emission in YVO[sub 4]:Yb,Ho

AUTHOR(S)
Ryba-Romanowski, W.; Golab, S.; Dominiak-Dzik, G.; Solarz, P.; Lukasiewicz, T.
PUB. DATE
November 2001
SOURCE
Applied Physics Letters;11/5/2001, Vol. 79 Issue 19, p3026
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Upon continuous wave excitation around 1 μm, a YVO[sub 4] crystal codoped with ytterbium and holmium exhibits intense red emission originating in the [sup 5]F[sub 5] level and considerably weaker green emission originating in the [sup 5]S[sub 2] level of Ho[sup 3+]. The ratio of the red to green emission intensities is 17:1 at 300 K. The dependence of the intensity of both emissions on the pump power is nearly the same but the mechanisms determined on the basis of short pulse excitation are found to be different. It is concluded that the green emission is excited by two consecutive energy transfers from Yb[sup 3+] to Ho[sup 3+], whereas excited state absorption is involved in the excitation of red emission. © 2001 American Institute of Physics.
ACCESSION #
5439416

 

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