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首页> 外文会议>Congress of the international commission for optics: Optics for the next millennium;ICO XVIII >Optical properties and green upconversion emission from Er3+-doped sol-gel silica glasses under red light (632.8-nm) excitation
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Optical properties and green upconversion emission from Er3+-doped sol-gel silica glasses under red light (632.8-nm) excitation

机译：掺Er3 +的溶胶-凝胶石英玻璃在红光（632.8-nm）激发下的光学性质和绿色上转换发射

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Abstract: The sol-gel process has been employed to prepare highly doped Er$+3$PLU$/ silica glasses, up to 5-wt% for homogeneous doping distribution. The optical characteristics of the silica glasses including the UV/VIS absorption and fluorescence emission spectra under excitation of 488 nm and 520 nm lights were measured. Micro-Raman spectra of these silica glasses heated at different temperatures from 200$DGR@C to 1100$DGR@C under 632.8 nm laser beam excitation of the He-Ne laser also recorded. The green up conversion emission from Er$+3$PLU$/ ion doped into the silica glasses heated to 1000$DGR@C under red light (632.8 nm) excitation has been observed. Two green and weak emission bands, centered at 525 and 550 nm, for the $+2$/H$-11/2$/ $YLD $+4$/I$-15/2$/ and $+4$/S$-3/2$/ $YLD $+4$/I$-15/2$/ transitions, respectively, have been observed. The blue upconversion emission er$+3$PLU$/ at 300 K centered at 460 nm was observed rather strength depends on the He-Ne laser pump powers and the Er$+3$PLU$/ concentration. The pump wavelength is far from any electronic absorption from the ground state of the Er$+3$PLU$/ ion, but corresponds to the excited state absorption. This upconversion process was interpreted by the excited state absorption and an upconversion mechanisms is proposed.!3
机译：摘要：溶胶-凝胶法已被用来制备高掺杂的Er $ + 3 $ PLU $ /石英玻璃，其掺杂量可达5 wt％，以实现均匀的掺杂分布。测量了石英玻璃的光学特性，包括在488 nm和520 nm光激发下的UV / VIS吸收和荧光发射光谱。还记录了这些石英玻璃在He-Ne激光的632.8 nm激光激发下从200 $ DGR @ C加热到1100 $ DGR @ C的不同温度下的显微拉曼光谱。观察到在红色光（632.8 nm）激发下，掺入加热至1000 $ DGR @ C的石英玻璃中的Er $ + 3 $ PLU $ /离子产生的绿色转换发射。 $ + 2 $ / H $ -11 / 2 $ / $ YLD $ + 4 $ / I $ -15 / 2 $ /和$ + 4 $ /两个绿色和较弱的发射带，分别位于525和550 nm处分别观察到S $ -3 / 2 $ / $ YLD $ + 4 $ / I $ -15 / 2 $ /转换。观察到以460 nm为中心的300 K处的蓝色向上转换发射er $ + 3 $ PLU $ /，而强度取决于He-Ne激光泵浦功率和Er $ + 3 $ PLU $ /浓度。泵浦波长与来自Er $ + 3 $ PLU $ /离子的基态的电子吸收相差甚远，但对应于激发态吸收。该上转换过程由激发态吸收来解释，并提出了上转换机制。！3

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