CAJ | 학술논문

用双坩埚法从高温溶液里生长出线度达7 mm的Nd3+:NaLa(WO4)2晶体.扫描电子显微镜的观察结果表明,虽然在晶体冷却过程中经历了两个相变,但相变并未造成晶体开裂;样品的X射线衍射花样可以看出,所得晶体为纯低温四方相的Nd3+:NaLa(WO4)2.在室温下对晶体的光吸收和光发射作了测量,发现晶体在804 nm有个半高宽达到23 nm的宽吸收峰.计算出晶体在804 nm处的吸收截面为7.24×10-20 cm2,在1057 nm处的发射截面为6.54×10-20 cm2.
용쌍감과법종고온용액리생장출선도체7 mm적Nd3+:NaLa(WO4)2정체.소묘전자현미경적관찰결과표명,수연재정체냉각과정중경력료량개상변,단상변병미조성정체개렬;양품적X사선연사화양가이간출,소득정체위순저온사방상적Nd3+:NaLa(WO4)2.재실온하대정체적광흡수화광발사작료측량,발현정체재804 nm유개반고관체도23 nm적관흡수봉.계산출정체재804 nm처적흡수절면위7.24×10-20 cm2,재1057 nm처적발사절면위6.54×10-20 cm2.
Nd3+:NaLa(WO4)2 crystals with a dimension up to 7 mm were grown from a high temperature solution using a double-crucible method. Scanning electron microscopy observations of the crystals showed that there were no small cracks on the surface of the crystals although they underwent two phase transitions when cooling down from high temperatures. X-ray diffraction studies indicated that the as-obtained product is pure lowtemperature tetragonal Nd3+:NaLa(WO4)2. The absorption and fluorescence spectra for Nd3+:NaLa(WO4)2 were measured at room temperature. The absorption band at 804 nm has a wide full-width half maximum of 23 nm whose origin is discussed. The absorption and emission cross sections were calculated to be 7.24×10-20 cm2 at 804 nm and 6.54×10-20 cm2 at 1057 nm, respectively.