2-PHOTON RESONANCE-ENHANCED TRANSIENTS IN FEMTOSECOND SPECTRA OF MOLECULAR AGGREGATES

Authors
GAIZAUSKAS E FELLER KH
Citation
E. Gaizauskas et Kh. Feller, 2-PHOTON RESONANCE-ENHANCED TRANSIENTS IN FEMTOSECOND SPECTRA OF MOLECULAR AGGREGATES, Photochemistry and photobiology, 66(5), 1997, pp. 611-617
Citations number
24
Categorie Soggetti
Biophysics,Biology
Journal title
Photochemistry and photobiology → ACNP
ISSN journal
00318655
Volume
66
Issue
5
Year of publication
1997
Pages
611 - 617
Database
ISI
SICI code
0031-8655(1997)66:5<611:2RTIFS>2.0.ZU;2-H
Abstract
Two-photon resonance-enhanced four-wave mixing processes relevant to p ump-probe difference absorption measurements with femtosecond pulses i n linear aggregates were analyzed theoretically. Transitions to two-ex citon bands were found to be contributing to coherent transients of th e time-resolved spectra around the zero delay time. This part of the s ignal provides in principle the possibility of direct measurement of t he exciton delocalization length.