微流道中消逝场激励的荧光光源研究

• 作 者: 张远宪 储玉飞 普小云
• 机 构: 云南大学物理系,
• 出 处: 光学学报
• 发表日期: 2017年01期
• 关键词: 微流道 荧光辐射 消逝场 光纤轴 光纤光学 溶液的浓度 PDMS 包层 染料溶液 聚二甲基硅氧烷

将石英裸光纤植入聚二甲基硅氧烷(PDMS)基片的微流道中,采用沿光纤轴向光激励、消逝场激励染料分子的方式,在基片微流道中获得均匀的荧光辐射。实验发现,在激励光强确定的条件下,荧光辐射的强度与染料溶液的浓度呈线性正相关关系,而与包层溶液的折射率呈非线性正相关的关系。用消逝波激励荧光的辐射理论,很好地解释了实验结果。

The bare quartz fiber is implanted into the microchannels of polydimethylsiloxane (PDMS) substrate. By means of optical excitation along the axial direction of the optical fiber and the evanescent field to excite the dye molecules, uniform fluorescence radiation is obtained in the microchannels of the substrate . It was found that there was a linear positive correlation between the intensity of fluorescence emission and the concentration of the dye solution under the condition of constant excitation light intensity and a nonlinear positive correlation with the refractive index of the cladding solution. Using evanescent wave excitation fluorescence theory, a good explanation of the experimental results.