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 |
显示于类别: | Articles |
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