Experimental Evidence for Exciton Scaling Effects in Self-Assembled Molecular Wires

P. G. Lagoudakis, M. M. de Souza, F. Schindler, J. M. Lupton, J. Feldmann, J. Wenus, and D. G. Lidzey
Phys. Rev. Lett. 93, 257401 – Published 13 December 2004

Abstract

Resonant Rayleigh scattering from self-assembled one-dimensional molecular J-aggregate wires reveals a distinct dependence of the exciton energy on the width of lateral extension. For the J aggregates used in this study, strong in-line dipole coupling leads to a delocalization of the exciton wave function over several molecular units. Polarization dependent measurements of resonantly scattered light from the wires show that the exciton dipole moment is oriented perpendicular to the long axis. The experimental observations can be described by applying a quantization condition to the center of mass motion of the J-band exciton in the wires.

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  • Received 19 July 2004

DOI:https://doi.org/10.1103/PhysRevLett.93.257401

©2004 American Physical Society

Authors & Affiliations

P. G. Lagoudakis*, M. M. de Souza, F. Schindler, J. M. Lupton, and J. Feldmann

  • Photonics and Optoelectronics Group, Department of Physics and CeNS, Ludwig-Maximilians-Universität, 80799 Munich, Germany

J. Wenus and D. G. Lidzey

  • Department of Physics and Astronomy, The University of Sheffield, Hicks Building, Hounsfield Road, Sheffield S3 7RH, United Kingdom

  • *Corresponding author. Electronic address: Pavlos.Lagoudakis@physik.uni-muenchen.de

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Issue

Vol. 93, Iss. 25 — 17 December 2004

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