Measurement of excited state absorption cross sections in C₆₀ by using steady state reverse saturable absorption method

The method of steady state reverse saturable absorption was proposed and the triple first excited state absorption cross sections of C₆₀ (at 488 nm wavelength and 514.5 nm wavelength respectively) were measured using this method. Owing to that only one modulated quasi-continuous Ar⁺ laser is used, this method is simpler than other methods and the requirements of light source and detector are significantly reduced.