微米Ｇ亚微米尺寸单液滴的操控与测量,是实现大气气溶胶复杂物理化学过程精确原位测量的关键, 已成为精密仪器研发的新方向.光镊技术可以利用激光的光梯度力控制悬浮单液滴,单液滴的自发和受激拉 曼信号提供了颗粒物理化学组成、浓度、折射率和半径等方面的信息,为大气气溶胶提供了一个独特的原位精 确测量方法.本文介绍几种不同类型的光镊技术,及其自发和受激拉曼测量技术在大气气溶胶领域中的应 用.

The manipulation and measurement of single droplets,ranging from micrometer to submicrometer size,are essential for precise in situ characterization of complex physicochem- ical processes in atmospheric aerosols.This represents a new direction in precision instru- ment development.Optical tweezer technology is a unique method that uses the gradient force of lasers to control suspended single droplets,enabling in situ precise measurements. The spontaneous and stimulated Raman signals from these droplets provide detailed informa- tion on the physicochemical composition,concentration,refractive index,and radius of par- ticles,which serve as a novel approach for studying atmospheric aerosols.This paper discus- ses some types of optical tweezer techniques and their applications in measuring spontaneous and stimulated Raman signals in the field of atmospheric aerosols.