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Lasing action in two-dimensional organic photonic crystal lasers with hexagonal symmetry

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Abstract

We investigate fluorescence and lasing action from strongly modulated two-dimensional surface relief structures with hexagonal symmetry onto which thin films of optically active organic material have been deposited. As compared with second-order laser structures with square symmetry, these organic photonic crystal lasers exhibit unusual feedback mechanisms. As a result, we observe surface-emitting lasing action with a central beam normal to the surface and a hexagonal emission pattern of side-beams whose direction slightly deviates from the normal. A corresponding theoretical analysis allows us to determine the photonic bandstructure and the low-threshold laser modes in this system. These results agree very well with fluorescence data and confirm the hexagonal lasing pattern and the corresponding emission angles.

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Authors and Affiliations

  1. Freiburger Materialforschungszentrum, Stefan-Meier-Str. 21, 79106, Freiburg, Germany

    K. Forberich

  2. Fraunhofer Institut für Solare Energiesysteme ISE, Heidenhofstr. 2, 79110, Freiburg, Germany

    K. Forberich & A. Gombert

  3. Institut für Theorie der Kondensierten Materie, Universität Karlsruhe, 76128, Karlsruhe, Germany

    M. Diem & K. Busch

  4. Department of Physics and College of Optics & Photonics: CREOL & FPCE, University of Central Florida, Orlando, FL, 32816, USA

    M. Diem & K. Busch

  5. Institut für Theoretische Festkörperphysik, Universität Karlsruhe, 76128, Karlsruhe, Germany

    M. Diem & K. Busch

  6. Photonics and Optoelectronics Group, Physics Department and CeNS, Ludwig-Maximilians-Universität, Amalienstr. 54, 80799, Munich, Germany

    J. Crewett

  7. Lichttechnisches Institut, Universität Karlsruhe, 76128, Karlsruhe, Germany

    U. Lemmer

Authors
  1. K. Forberich
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  2. M. Diem
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  3. J. Crewett
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  4. U. Lemmer
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  5. A. Gombert
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  6. K. Busch
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Corresponding author

Correspondence to K. Forberich.

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PACS

42.55.Tv; 42.70.Jk; 42.70.Qs

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Forberich, K., Diem, M., Crewett, J. et al. Lasing action in two-dimensional organic photonic crystal lasers with hexagonal symmetry. Appl. Phys. B 82, 539–541 (2006). https://doi.org/10.1007/s00340-005-2120-y

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  • DOI: https://doi.org/10.1007/s00340-005-2120-y

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