Light-induced charge transport in Mn-doped near-stoichiometric LiNbO<sub>3</sub> under cw UV illumination

Youwen Liu; Kenji Kitamura; Shunji Takekawa; Ganesan Ravi; Masaru Nakamura; Hideki Hatano

doi:10.1117/12.557464

22 October 2004 Light-induced charge transport in Mn-doped near-stoichiometric LiNbO₃ under cw UV illumination

Youwen Liu, Kenji Kitamura, Shunji Takekawa, Ganesan Ravi, Masaru Nakamura, Hideki Hatano

Proceedings Volume 5560, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications X; (2004) https://doi.org/10.1117/12.557464
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

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.

Citation Download Citation

Youwen Liu, Kenji Kitamura, Shunji Takekawa, Ganesan Ravi, Masaru Nakamura, and Hideki Hatano "Light-induced charge transport in Mn-doped near-stoichiometric LiNbO₃ under cw UV illumination", Proc. SPIE 5560, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications X, (22 October 2004); https://doi.org/10.1117/12.557464

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