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Conference Paper
Photorefractive Effects, Materials, and Devices
Sanya, Hainan China
July 19, 2005
ISBN: 1-55752-793-8
Material Preparation and Characterization: Inorganic (MPCI)

Lifetime of small polarons in nominally pure, reduced LiNbO3

M. Imlau, C. Merschjann, D. Berben, and M. WÖhlecke

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The processes of optical dissociation and recombination of bipo-larons are investigated in congruently melting lithium niobate. Time-resolved and temperature-dependent measurements of the light-induced absorption in the blue, red and infrared spectral range after exposure to short, intense laser pulses (l = 532 nm) are performed and the lifetime of small free polarons is determined in undoped LiNbO3 at room temperature for the first time. A qualitative charge-transport model for dissociation of bipolarons and recombination of small polarons is developed on the basis of our findings.

© 2005 Optical Society of America

OCIS Codes
(160.3730) Materials : Lithium niobate
(300.6500) Spectroscopy : Spectroscopy, time-resolved

M. Imlau, C. Merschjann, D. Berben, and M. WÖhlecke, "Lifetime of small polarons in nominally pure, reduced LiNbO3," in Photorefractive Effects, Materials, and Devices, G. Zhang, D. Kip, D. Nolte, and J. Xu, eds., Vol. 99 of OSA Trends in Optics and Photonics (Optical Society of America, 2005), paper 68.

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