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  • 學位論文

鎂鐵雙摻近等化學計量鉭酸鋰單晶生長之研究

Research of Mg, Fe Codoped Near-stoichiometric Lithium Tantalate Single Crystal

指導教授 : 余琬琴

摘要


光折變晶體、有機光電材料作為超大容量儲存元件已被國際上公認為首選材料,尤其是光折變晶體材料具有體積小、儲存容量大、數據傳輸快、並行計算等優點,受到了各國科技界的極大重視。使用鉭酸鋰晶體製作超大容量儲存器也已成為各國科技研究機構的焦點,特別是光影像儲存技術迅速發展。 在論文中我們成功生長不同濃度的鎂鐵雙摻SLT晶體,透過不同的鐵摻,我們能探討不同鐵摻雜濃度對晶體的性質影響,我們將使用組成量測(ICP) 、X-ray量測、蝕刻密度、光學量測(FTIR、 UV-Visible-NIR),來評價晶體並研究其取代機制。並透過氧化熱處理,了解鐵離子在晶體中價數的轉變,並且由光學量測(FTIR、 UV-Visible-NIR)做出初步評價。

並列摘要


The photorefractive crystals and the original optoelectrical materials have been widely regarded as the primary material for the manufacture of high-capacity storage device. In particular, The photorefractive crystal have drawn much attention from the technology world in many countries due to their advantages such as small volume, high storage capacity, and optical calculation. Among all the the photorefractive crystal, using LiTaO3 crystal to manufacture high-capacity storage device has been the focus of the research groups around the world. In this thesis, we have successfully grown Mg、Fe codoped SLT crystals with different concentration. Through the variation of the Fe concentration, we discussed the effect of Fe concentration on the characteristics of the crystal. Several tests, including ICP, X-ray measurement, EPD, optical measurements (FTIR and UV-Visible-NIR), were employed to evaluate the crystal and to study the of substitution mechanism. Though the oxidation annealing, transition of the oxidation state of iron ions was investigated and the primary evaluation was given using optical measurements, including FTIR and UV-Visible-NIR.

並列關鍵字

Crystal LiTaO3 SLT Stichiometric Mg、Fe codoped

參考文獻


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