COLLECTIVE OPTICAL-RESPONSE OF MOLECULAR AGGREGATES

被引:40
作者
FIDDER, H [1 ]
WIERSMA, DA [1 ]
机构
[1] UNIV GRONINGEN,CTR MAT SCI,DEPT CHEM PHYS,ULTRAFAST LASER & SPECT LAB,9747 AG GRONINGEN,NETHERLANDS
来源
PHYSICA STATUS SOLIDI B-BASIC RESEARCH | 1995年 / 188卷 / 01期
关键词
D O I
10.1002/pssb.2221880126
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
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.
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页码:285 / 295
页数:11
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