Defect Mode Emission of a Dye Doped Cholesteric Polymer Network

Jürgen Schmidtke, Werner Stille, and Heino Finkelmann
Phys. Rev. Lett. 90, 083902 – Published 25 February 2003

Abstract

We have observed enhanced fluorescence and laser emission due to a photonic defect mode in a dye doped cholesteric polymer network. The defect is caused by a phase jump of the cholesteric helix at the interface of two stacked layers of a cholesteric polymer film. Fluorescence spectra show an additional resonant mode inside the photonic stop band. Pulsed excitation gives rise to laser emission of the defect mode, with an exceptionally low lasing threshold. The defect mode emission has a circular polarization whose sense of rotation is opposite to that of the cholesteric helix.

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  • Received 3 September 2002

DOI:https://doi.org/10.1103/PhysRevLett.90.083902

©2003 American Physical Society

Authors & Affiliations

Jürgen Schmidtke1,*, Werner Stille1, and Heino Finkelmann2

  • 1Physikalisches Institut, Albert-Ludwigs-Universität, D-79104 Freiburg, Germany
  • 2Institut für Makromolekulare Chemie, Albert-Ludwigs-Universität, D-79104 Freiburg, Germany

  • *Electronic address: juergen.schmidtke@physik.uni-freiburg.de

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Issue

Vol. 90, Iss. 8 — 28 February 2003

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