Chinese Optics Letters, Volume. 7, Issue 6, 06524(2009)
Multi-photon upconversion luminescence of Er3+-doped Y2O3 nanocrystals
Visible upconversion emission intensities are investigated in Er3+-doped Y2O3 nanocrystals. We also find that the upconversion intensity varies nonlinearly with the excitation power with a threshold of 110 mW, which indicates that the green and red emissions would be photon avalanche upconversion when the excitation power exceeds the threshold.
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Yunxiang Wang, Yunfeng Bai, Yinglin Song. Multi-photon upconversion luminescence of Er3+-doped Y2O3 nanocrystals[J]. Chinese Optics Letters, 2009, 7(6): 06524
Received: Sep. 12, 2008
Accepted: --
Published Online: Jun. 8, 2009
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