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Appl Opt. 2011 Jan 20;50(3):287-90. doi: 10.1364/AO.50.000287.

Effect of photonic bandgap on upconversion emission in YbPO4:Er inverse opal photonic crystals.

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College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China.


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)→(4)I(15/2), and (4)F(9/2)→(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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