标题: Optical and holographic properties of Fe plus Mn co-doped Bi4Ge3O12 crystals
作者: Marinova, Vera
Petrova, Dimitrina
Lin, Shiuan Huei
Hsu, Ken Yuh
电子物理学系
光电工程学系
Department of Electrophysics
Department of Photonics
公开日期: 1-一月-2008
摘要: The effect of iron and manganese co-doping on the light-induced, dark- and photoconductivity and holographic properties of Bi4Ge3O12 crystals in comparison with Fe- and Mn-single doping is studied. Fe+Mn co-doped crystals exhibited strong photochromic effect at room temperature, the photochromic effect being fully reversible by thermal annealing. The observed light-induced absorption changes and non-linear dependence of photoconductivity on light intensities indicate deep and shallow photoactive levels contribution to the charge transport mechanism of Fe+Mn co-doped BGO. Holographic gratings are successfully recorded at different wavelengths and a possibility to extend the photorefractive sensitivity into the red spectral range is demonstrated. It is found furthermore that Fe+Mn-doping combination leads to faster response time during holographic recording, especially after a preliminary exposure with ultraviolet light, in comparison with Fe- and Mn-single doping. (c) 2007 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.optcom.2007.09.003
http://hdl.handle.net/11536/9858
ISSN: 0030-4018
DOI: 10.1016/j.optcom.2007.09.003
期刊: OPTICS COMMUNICATIONS
Volume: 281
Issue: 1
起始页: 37
结束页: 43
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