標題: Light-induced and holographic properties of ruthenium and manganese co-doped Bi4Ge3O12 crystals
作者: Lin, S. H.
Marinova, V.
Lin, Y. C.
Petrova, D.
Chou, W. C.
Hsu, K. Y.
電子物理學系
光電工程學系
光電工程研究所
Department of Electrophysics
Department of Photonics
Institute of EO Enginerring
關鍵字: optical properties;photochromic effect;photoluminescence;dark conductivity;holography
公開日期: 1-七月-2010
摘要: The effect of Ru + Mn co-doping on the light-induced properties of Bi4Ge3O12 (BGO) crystals is studied and compared with single Ru- and Mn-doped crystals. Optical absorption spectra of Ru + Mn co-doped crystal demonstrates a photosensitivity shift to the visible spectral range. In addition, a strong photochromic effect, being fully reversible by thermal annealing is observed. It is verified by photoluminescence emission that charge traps could be manipulated under ultraviolet (UV) excitation, as the photoluminescence intensity decreases revealing the existence of the state filling effect. Ru + Mn doping leads to a faster response time during holographic recording at 633 nm and a prolonged read-out process, especially after a preliminary exposure to UV light. The ability to modify the defect structure and corresponding absorption bands suggests the future potential for optical fixing using a two-step sensitization method.
URI: http://dx.doi.org/10.1088/2040-8978/12/7/075601
http://hdl.handle.net/11536/149986
ISSN: 2040-8978
DOI: 10.1088/2040-8978/12/7/075601
期刊: JOURNAL OF OPTICS
Volume: 12
顯示於類別:期刊論文