The polarization dependence of rotational diffusion of quantum rods was investigated and characterized by analyzing
amplitude and characteristic time of the correlation functions. In order to measure the polarization dependence, a
polarized fluorescence correlation spectroscopy system was composed based on a microscope. From the results, the
rotational diffusion region of Qrod was observed at a time range below 10-5 s, and the rotational diffusion parameters
were extracted by using a rotational diffusion model. The parameters revealed the polarization dependence of rotational
diffusion of Qrod in solution. We showed that polarized FCS is quite useful to investigate rotational diffusion of rod-like
particles.
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