Direct measurement of the picosecond decay time of the J aggregate of pseudoisocyanine iodide using an optically compressed frequency-doubled continuous wave Nd—YAG laser and a synchronously operating streak camera

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Abstract

Using the shorter than 4 ps pulses at 532 nm from a frequency-doubled optically compressed continuous wave Nd—YAG laser, in conjunction with a synchronously operating streak camera, the flourescence decay of the J aggregates of 1,1′-diethyl-2,2′-cyanine (pseudoisocyanine) iodide has been measured with picosecond resolution to be 24 ps. The power and concentration dependence are also described.

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