光阱中光致旋转测量液体温度的研究  

Study on measuring the liquid temperature by testing the optically driven rotation in optical tweezers

作　　者：魏强[1] 秦水介[1] 

机构地区：[1]贵州大学贵州省光电子技术及应用重点实验室,贵州贵阳550025

出　　处：《激光与红外》2010年第6期598-600,共3页Laser & Infrared

基　　金：国家自然科学基金(No.50375031);2006年度教育部博士点基金项目(No.20060657002)资助

摘　　要：根据偏振光束与双折射性晶体粒子的相互作用原理,对双折射性晶体粒子在激光光阱中的转动频率与粒子所在液体的粘滞系数的关系进行了研究,并利用MATLAB数值仿真对其进行了分析。分析结果显示了液体的粘滞系数影响粒子的转动频率,而液体的粘滞系数与液体的温度相关,这样可以通过观测粒子的转动频率的变化得到液体的温度改变,实现对液体温度实时监测。Based on the theory of interaction between polarized light beam and birefringence crystal particles, relationship of the rotation frequency with the liquid viscosity coefficient was studied in the optical tweezers, simulations with Matlab were also made. It came to the conclusion that the rotation frequency of particles is affected by the liquid viscosity coefficient. The liquid viscosity depends on the temperature of liquid. So the change of the temperature can be obtained by observing the rotation frequency for the real-time temperature measurement.

关 键 词：光镊 温度 粘滞系数 光致旋转 

分 类 号：TN249[电子电信—物理电子学]