Abstract
We obtained upconversion (UC) light-emitting photonic materials () 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 , , and transitions of has been observed in the inverse opals of the -doped . Significant suppression of the UC emission was detected if the photonic bandgap overlapped with the ions emission band, while enhancement of the UC emission occurs if the emission band appears at the edge of the bandgap.
© 2011 Optical Society of America
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