Exciton-exciton scattering in a one-dimensional J aggregate
State Key Laboratory of Supramolecular Structure and Materials, Jilin University - 2699 Qianjin Street, Changchun 130012, PRC and Department of Theoretical Physics, Vilnius University - Sauletekio 9-III, Vilnius LT-10222, Lithuania, EU
Received: 21 January 2013
Accepted: 19 February 2013
The exciton scattering approach is applied to describe an exciton-exciton interaction problem in an excitonic linear aggregate. An analytic expression for the scattering amplitude is derived for an infinite periodic system. The result allows to obtain a typical spectral lineshape of the main resonance of the J aggregate in the coherent third-order two-dimensional spectra. The obtained functional form of the scattering allows to suggest a universal expression of the scattering amplitude for delocalized excitons in realistic systems.
PACS: 71.35.Aa – Frenkel excitons and self-trapped excitons / 78.67.Sc – Nanoaggregates; nanocomposites / 78.47.jh – Coherent nonlinear optical spectroscopy
© EPLA, 2013