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钨酸锌晶体的受激拉曼散射和光致发光研究

Investigating of SRS and luminescence of ZnWO₄ crystals

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【Author】 Zang Jing-Cun 1) Xie Li-Yan 1) Li Xiao 1) Zhang Dong-Xiang 2) Feng Bao-Hua 2) 1)(College of Materials Science and Engineering, Beijing University of Technology, Beijing 100022, China) 2)(Key Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China)

【机构】北京工业大学材料科学与工程学院；中国科学院物理研究所光物理实验室；中国科学院物理研究所光物理实验室北京100022；北京100022；北京100080；

【摘要】采用皮秒532nm激光激发,研究了ZnWO4晶体的受激拉曼散射和本征荧光发射.在SRS光谱中观察到一级(558.7nm)和二级(588.6nm)斯托克斯光,线宽分别为130和77cm-1,一级斯托克斯光的抽运阈值为6.8mJ.在532nm激光抽运下ZnWO4晶体的荧光光谱呈现出由能量为2.30,2.45和2.83eV的3个高斯分量组成的独特结构.光致发光表明晶体具有从400nm到650nm的宽带本征发光,其峰值波长为472.0nm,相应于钨氧之间的辐射跃迁.更多还原

【Abstract】 The stimulated Raman scattering （SRS） and luminescence spectra of ZnWO₄ crystals were investigated using 532nm laser excitation at room temperature. It was found that the first order （558.7nm） and second order （588.6nm） of SRS have 130 and 77cm-1 line widths and the pump threshold at 558.7nm is 6.8mJ. The luminescence spectrum of ZnWO₄ crystals under 532nm laser excitation has the peculiarity of having the band structure composed of three-Gaussian components. The photoluminescence spectrum shows broadband emission from 400nm to 650nm peaked about 472.0nm, which is attributed to the radiative transitions between tungsten and oxygen.更多还原