標題: 鐿離子的添加對鉺摻雜氧化鈦與氧化矽的結構與螢光性質之影響
Effect of Yb3+ ion Additionon Structure and Photoluminescence Properties of Er3+-doped Titania/Sillica
作者: 張鳴修
Ming-Hsiu Chang
陳三元
San-Yuan Chen
材料科學與工程學系
關鍵字: 鐿離子;鉺摻雜;氧化鈦;螢光;光纖放大器;鉺離子;Yb3+;Er3+-doped;Er3+;Photoluminescence;Yetterbium;titania;PL;erbium
公開日期: 2000
摘要: 由於鉺摻雜材料~1.54μm的螢光正好落於矽光纖的最低能量損失波帶附近•故鉺離子非常適用於當做矽光纖放大器的摻雜物。加入鐿離子當作增感劑可提高980nm光波對系統的起能(pumping)效率,激發態的鐿離子會藉由能量轉移(energy transfer)將能量傳給鉺離子以提高佔據4I13/2能階的電子數目。因此提高1.54μm的螢光強度。故本實驗將就不同母材(host materials)、共摻雜物的添加、起始物的組成比例與熱處理溫度條件來研究其對鉺螢光發光的作用,並探討影響鉺螢光發光的機制。實驗結果顯示,在Er-Yb-Ti系統中成相後對稱性提高造成螢光強度下降的效應比較強。這是由於Er-Yb-Ti系統中成相後鉺離子為8配位對稱性較高,而在Er-Yb-Si成相後鉺離子為6配位對稱性較低。
Erbium doped materials are of great interest in thin film integrated optoelectronic technology because 1.54μm from Er3+ intra-4f emission is a standard telecommunication wavelength. In this research, the addition of Yb3+ ions as sensitizer can lead to the enhancement of ~1.54μm PL efficiency. This is due to that erbium ions can absorb the 980 nm light more efficiently then transfer the energy to other Er3+ ions so as to increase the population of 4I13/2 level. In Yb3+-Er3+co-doped sillica/titania systems, phase evolution and photoluminescence properties would be investigated in different doping levels and temperatures. Results show that symmetry effect in Yb3+-Er3+ co-doped titania system is stronger than that in the Yb3+-Er3+ co-doped silica system. The difference is attributed to the different coordination conditions of Er3+ in two systems. After pyrochlore phase is formed, Er3+ is 8-fold coordinated in titania system while Er3+ is 6-fold coordinated in titania system.The PL intensity properties result from the competition effects of OH- content and structural symmetry. The maximum PL intensity in Yb3+-Er3+ co-doped titania system appears at lower temperature of 700℃, compared to Yb3+-Er3+ co-doped silica system.
URI: http://140.113.39.130/cdrfb3/record/nctu/#NT890159022
http://hdl.handle.net/11536/66646
Appears in Collections:Thesis