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Optical dephasing of triply ionized rare earths in transparent glass ceramics containing LaF3 nanocrystals

Zheng, Hairong and Zhang, Xiangyu and Gao, Dangli and Meltzer, Richard S. (2008) Optical dephasing of triply ionized rare earths in transparent glass ceramics containing LaF3 nanocrystals. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, 8 (3). pp. 1214-1217.

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Official URL: http://www.ingentaconnect.com/content/asp/jnn/2008...

Abstract

Optical dephasing of Pr3+ and Tm3+ ions doped in transparent oxyfluoride glass ceramics was studied with the two-pulse photon echo technique. It was found that the dephasing time of rare earth ions is dramatically less in nanocrystals embedded in a glass matrix than in bulk crystals. A quasi-linear temperature dependence obtained at low temperatures proved that the long-range interaction of the ions inside the nanocrystals with the two level systems of the glass matrix dominates the optical dephasing. The local thermal effect in glass ceramics containing nanocrystals elevates the local temperature, which results in the reduction of optical dephasing time. For Tm3+ doped glass ceramics, the elevation of local temperature induced by the irradiation of excitation laser even quenched the photon echo signals in the experimental study.

Item Type:Article
Uncontrolled Keywords:optical dephasing; glass ceramics containing nanocrystals; local thermal effect
Subjects:Physical Science > Photonics
ID Code:1482
Deposited By:Farnush Anwar
Deposited On:15 Dec 2008 10:07
Last Modified:15 Dec 2008 10:07

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