Diffusion of single molecules through a Gaussian laser beam

摘要: The diffusion of a single molecule through sharply focused laser beam has been observed. was observed by recording photoelectron bursts molecules in transit the with Gaussian intensity profile. Up to 20 photoelectrons were detected for Rhodamin 6G time 40 .ts which corresponds volume element 2x10'61. From correlation probability occurence one observation is determined. existence events also verified measured and calculated number distribution.