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Proceedings Paper

Light-induced charge transport in Mn-doped near-stoichiometric LiNbO3 under cw UV illumination
Author(s): Youwen Liu; Kenji Kitamura; Shunji Takekawa; Ganesan Ravi; Masaru Nakamura; Hideki Hatano
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Paper Abstract

Near-stoichiometric LiNbO3 crystals slightly doped with Mn from different Li concentrations in the melt were grown by the top seeded solution growth method. The light-induced (small polarons) absorption under UV illumination was probed using near-IR of 780 nm. The dark decay process shows a stretched-exponential behavior. The dependences of the light-induced absorption, the decay time constant, and the stretching factor on the pumping intensity were presented. The photovoltaic current intensity and the photoconductivity under UV illumination were measured by applying a DC field along the z-axis of the sample. The photoconductivity intensity showed superlinear dependence of intensity. The experimental results can be explained quantitatively by developing the two-center charge transport model with direct excitation and recombination between Mn and small polarons.

Paper Details

Date Published: 22 October 2004
PDF: 6 pages
Proc. SPIE 5560, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications X, (22 October 2004); doi: 10.1117/12.557464
Show Author Affiliations
Youwen Liu, National Institute for Materials Science (Japan)
Kenji Kitamura, National Institute for Materials Science (Japan)
Shunji Takekawa, National Institute for Materials Science (Japan)
Ganesan Ravi, National Institute for Materials Science (Japan)
Masaru Nakamura, National Institute for Materials Science (Japan)
Hideki Hatano, Pioneer Corp. (Japan)


Published in SPIE Proceedings Vol. 5560:
Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications X
Francis T. S. Yu; Ruyan Guo; Shizhuo Yin, Editor(s)

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