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Collective optical response of molecular aggregates
Author(s) -
Fidder H.,
Wiersma D. A.
Publication year - 1995
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221880126
Subject(s) - dephasing , delocalized electron , exciton , raman scattering , raman spectroscopy , phonon , fluorescence , quantum yield , j aggregate , line (geometry) , molecular physics , scattering , resonance fluorescence , absorption (acoustics) , resonance (particle physics) , chemistry , materials science , condensed matter physics , physics , atomic physics , optics , geometry , mathematics , organic chemistry
Relative fluorescence quantum yield, fluorescence lifetime, optical dephasing, and absorption line shift data are presented for both excitonic transitions of the pseudoisocyanine (PIC) J‐aggregate. The data indicate activation of the optical dephasing by exciton‐acoustic phonon scattering at low temperatures. Above approximately 80 K the optical dephasing, line shift as well as the fluorescence lifetime lengthening call for activation by high frequency phonons. Moreover, resonance Raman data indicate the delocalization of low frequency vibrational modes in the aggregate.