Acta Optica Sinica, Volume. 17, Issue 5, 539(1997)
Phase Relaxation of Frenkel Exciton Migration in the Nanostructure Mixed Molecular Aggregates
Energy barriers were formed in PIC Ⅰ dye doped with azaPIC Ⅰ changing the physical sizes of PIC Ⅰ J aggregates. Dephasing processes of coherent Frenkel excitons were studied using accumulated photon echo with double modulation and heterodyne detection technique. The lengthening of dephasing time T 2, from 60 ps to 224 ps, were observed with increasing the molar fractions of azaPIC Ⅰ. It is contrary to the shortening of T 2 in the mixed aggregates with traps. The coherence lengths of excitons in the mixed aggregates were investigated theoretically and experimentally.
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[in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese], [in Chinese]. Phase Relaxation of Frenkel Exciton Migration in the Nanostructure Mixed Molecular Aggregates[J]. Acta Optica Sinica, 1997, 17(5): 539