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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 15 — Jul. 18, 2011
  • pp: 14083–14092

White emission of lithium ytterbium tetraphosphate nanocrystals

W. Strek, L. Marciniak, A. Bednarkiewicz, A. Lukowiak, R. Wiglusz, and D. Hreniak  »View Author Affiliations

Optics Express, Vol. 19, Issue 15, pp. 14083-14092 (2011)

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An efficient anti-Stokes white broadband emission induced by 976 nm laser diode in lithium ytterbium tetraphosphate (LiYbP4O12) nanocrystals was investigated. The emission occurs at room temperature and atmospheric pressure. Its intensity demonstrates an evident threshold dependence on the temperature and excitation density characteristic to avalanche process. The white emission is accompanied by very efficient photoconductivity characterized by microampere photocurrent which increases with the fourth order of applied incident light power (~P4). We show that this emission is critically dependent on temperature and increases significantly in vacuum. It is concluded that the anti-Stokes white emission is associated with the Yb3+- CT luminescence.

© 2011 OSA

OCIS Codes
(160.5690) Materials : Rare-earth-doped materials
(190.7220) Nonlinear optics : Upconversion
(300.2530) Spectroscopy : Fluorescence, laser-induced
(160.4236) Materials : Nanomaterials

ToC Category:

Original Manuscript: April 15, 2011
Revised Manuscript: June 6, 2011
Manuscript Accepted: June 26, 2011
Published: July 8, 2011

Virtual Issues
Vol. 6, Iss. 8 Virtual Journal for Biomedical Optics

W. Strek, L. Marciniak, A. Bednarkiewicz, A. Lukowiak, R. Wiglusz, and D. Hreniak, "White emission of lithium ytterbium tetraphosphate nanocrystals," Opt. Express 19, 14083-14092 (2011)

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