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Localized Optical Excitations and Two-Exciton Spectroscopy of Phenylacetylene Dendrimers

Published online by Cambridge University Press:  10 February 2011

V. Chernyak ,
E. Y. Poliakov ,
S. Tretiak  and
S. Mukamel
V. Chernyak
Affiliation:
Department of Chemistry, University of Rochester, Rochester, New York 14627
E. Y. Poliakov
Affiliation:
Department of Chemistry, University of Rochester, Rochester, New York 14627
S. Tretiak
Affiliation:
Department of Chemistry, University of Rochester, Rochester, New York 14627
S. Mukamel
Affiliation:
Department of Chemistry, University of Rochester, Rochester, New York 14627
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Abstract

The one- and two-exciton manifolds of conjugated dendrimers possessing fractal geometries are studied using the Frenkel exciton model. Two-photon spectra can be used to determine both the magnitude and the sign of short-range coupling among segments. Self-similarity and the high degree of symmetry make it possible to compute the one-exciton states and the optical response with reduced numerical effort that scales linearly rather than exponentially with the number of generations. The third-order optical response and exciton scattering matrix are expressed in compact forms using irreducible representation of optical excitations, totally avoiding the expensive explicit calculation of two-exciton eigenstates.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 543: Symposium W – Dynamics in Small Confining Systems IV , 1998 , 327
Copyright
Copyright © Materials Research Society 1999

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