Effect of photonic bandgap on upconversion emission in YbPO4:Er inverse opal photonic crystals.
Appl Opt
; 50(3): 287-90, 2011 Jan 20.
Article
em En
| MEDLINE
| ID: mdl-21263723
ABSTRACT
We obtained upconversion (UC) light-emitting photonic materials (YbPO(4)Er) with an inverse opal structure by the self-assembly technique in combination with a solgel method. The effect of the photonic stopband on the UC luminescence of the (2)H(11/2), (4)S(3/2)â(4)I(15/2), and (4)F(9/2)â(4)I(15/2) transitions of Er(3+) has been observed in the inverse opals of the Er(3+)-doped YbPO(4). Significant suppression of the UC emission was detected if the photonic bandgap overlapped with the Er(3+) ions emission band, while enhancement of the UC emission occurs if the emission band appears at the edge of the bandgap.
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MEDLINE
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En
Ano de publicação:
2011
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Article