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.