Applied Physics B

, Volume 82, Issue 4, pp 539–541

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

  • K. Forberich
  • M. Diem
  • J. Crewett
  • U. Lemmer
  • A. Gombert
  • K. Busch
Article

DOI: 10.1007/s00340-005-2120-y

Cite this article as:
Forberich, K., Diem, M., Crewett, J. et al. Appl. Phys. B (2006) 82: 539. doi:10.1007/s00340-005-2120-y

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.

Copyright information

© Springer-Verlag 2005

Authors and Affiliations

  • K. Forberich
    • 1
    • 2
  • M. Diem
    • 3
    • 4
    • 5
  • J. Crewett
    • 6
  • U. Lemmer
    • 7
  • A. Gombert
    • 2
  • K. Busch
    • 3
    • 4
    • 5
  1. 1.Freiburger MaterialforschungszentrumFreiburgGermany
  2. 2.Fraunhofer Institut für Solare Energiesysteme ISEFreiburgGermany
  3. 3.Institut für Theorie der Kondensierten MaterieUniversität KarlsruheKarlsruheGermany
  4. 4.Department of Physics and College of Optics & Photonics: CREOL & FPCEUniversity of Central FloridaOrlandoUSA
  5. 5.Institut für Theoretische FestkörperphysikUniversität KarlsruheKarlsruheGermany
  6. 6.Photonics and Optoelectronics Group, Physics Department and CeNSLudwig-Maximilians-UniversitätMunichGermany
  7. 7.Lichttechnisches InstitutUniversität KarlsruheKarlsruheGermany