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.
The stimulated Raman scattering （SRS） and luminescence spectra of ZnWO4 crystals were investigated using 532 nm laser excitation at room temperature. It was found that the first order （555.7 nm） and second order （555.6 nm） of SRS have 130 and 77 cm^- 1 line widths and the pump threshold at 558.7 nm is 6.8 mJ. The luminescence spectrum of ZnWO4 crystals under 532 nm laser excitation has the peculiarity of having the band structure composed of three-Gaussian components. The photoluminescence spectrum shows broadband emission from 400 nm to 650 nm peaked about 472.0 nm, which is attributed to the radiative transitions between tungsten and oxygen.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2007年第5期2689-2692,共4页
Acta Physica Sinica
基金
中国科学院物理研究所光物理重点实验室资助的课题~~
