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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 37, Iss. 7 — Apr. 1, 2012
  • pp: 1166–1168

Temperature dependence and quantum efficiency of ultrabroad NIR photoluminescence from Ni2+ centers in nanocrystalline Ba-Al titanate glass ceramics

Guojun Gao, Mingying Peng, and Lothar Wondraczek  »View Author Affiliations


Optics Letters, Vol. 37, Issue 7, pp. 1166-1168 (2012)
http://dx.doi.org/10.1364/OL.37.001166


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Abstract

Ultrabroad near-infrared (NIR) photoluminescence from Ni2+-centers in nanocrystalline Ba-Al titanate glass ceramics was studied by temperature-dependent static and dynamic photoluminescence spectroscopy in the regime of 10 to 300 K. Photoluminescence covers the spectral range of about 1100 nm to >1600nm with a typical bandwidth (FWHM) greater than 300 nm. For UV-LED excitation at 352 nm, an internal quantum efficiency of 65% is obtained. The excited state lifetime τ at room temperature is 39 μs. The stimulated emission cross section σem is 8.5×1020cm2, resulting in a practical figure of merit, σem*τ, of 3.3×1024cm2s at room temperature. These properties suggest suitability as a broadband gain medium for tunable lasers and optical amplifiers.

© 2012 Optical Society of America

OCIS Codes
(160.2540) Materials : Fluorescent and luminescent materials
(160.2750) Materials : Glass and other amorphous materials
(160.4670) Materials : Optical materials
(160.6990) Materials : Transition-metal-doped materials
(300.6280) Spectroscopy : Spectroscopy, fluorescence and luminescence

ToC Category:
Materials

History
Original Manuscript: January 19, 2012
Revised Manuscript: January 25, 2012
Manuscript Accepted: January 25, 2012
Published: March 23, 2012

Citation
Guojun Gao, Mingying Peng, and Lothar Wondraczek, "Temperature dependence and quantum efficiency of ultrabroad NIR photoluminescence from Ni2+centers in nanocrystalline Ba-Al titanate glass ceramics," Opt. Lett. 37, 1166-1168 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-7-1166


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