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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 12 — Jun. 6, 2011
  • pp: 11753–11758

Upconversion luminescence of an insulator involving a band to band multiphoton excitation process

Jiwei Wang, Jian Hua Hao, and Peter A. Tanner  »View Author Affiliations

Optics Express, Vol. 19, Issue 12, pp. 11753-11758 (2011)

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A multiphoton process to the conduction band of the insulator Er2O3 is reported, which occurs in vacuum under near infrared excitation. The enormous upconversion intensity is two orders of magnitude greater than that in air, and also the intensity ratio for green and red emission bands is inverted. The mechanism is probed by experiments of laser power dependence, cathodoluminescence, photoconductivity dependence and chemical dilution, and it involves cross-relaxation energy transfer upconversion of erbium ions to reach the conduction band. The upconversion color is tunable by changes in pressure, laser diode intensity and wavelength, or dopant ion concentration.

© 2011 OSA

OCIS Codes
(040.5150) Detectors : Photoconductivity
(140.6810) Lasers and laser optics : Thermal effects
(160.5690) Materials : Rare-earth-doped materials
(170.6280) Medical optics and biotechnology : Spectroscopy, fluorescence and luminescence
(140.3613) Lasers and laser optics : Lasers, upconversion

ToC Category:

Original Manuscript: March 21, 2011
Revised Manuscript: May 9, 2011
Manuscript Accepted: May 26, 2011
Published: June 1, 2011

Jiwei Wang, Jian Hua Hao, and Peter A. Tanner, "Upconversion luminescence of an insulator involving a band to band multiphoton excitation process," Opt. Express 19, 11753-11758 (2011)

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