@inproceedings{a65d66cccc874c7b828b921aa065b412,
title = "Multiphoton upconversion emission switching in Tm,Yb co-doped nanocrystalline yttria",
abstract = "Multiphoton upconversion luminescence (UL) properties from the Yb 3+-sensitized Tm3+ ions in nanocrystalline yttria host were studied experimentally under 973 nm laser excitation. Bright pure blue luminescence in the visible spectral region was performed even at low pump excitation level. An interesting chromatic switching behavior was observed for the near-infrared and blue spectral bands at room temperature, showing a pump intensity-controlled emission wavelength switcher. The chromatic switching is intrinsically associated with the competition of two-photon UL and three-photon UL processes. Moreover, the wavelength switching of Stark emission of Tm 3+ 1G4 state took place as the pump intensity rises enough. This phenomenon is attributed to pump induced photothermal effect changing the distribution of Stark level populations in Tm3+ 1G4 energy state.",
keywords = "Tm doped nanocrystal, chromatic switching, luminescence switcher, upconversion emission",
author = "L. Li and Dong, \{G. Z.\} and Zhang, \{X. L.\} and M. Nie and Cui, \{J. H.\} and Zhang, \{X. W.\} and Li, \{R. M.\}",
year = "2010",
doi = "10.1117/12.869815",
language = "英语",
isbn = "9780819483775",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
booktitle = "Optoelectronic Devices and Integration III",
note = "Optoelectronic Devices and Integration III ; Conference date: 18-10-2010 Through 20-10-2010",
}