Article

Applied Physics B

, Volume 86, Issue 3, pp 413-417

First online:

Dual-wavelength laser emission from an organic microcavity with terahertz beating

  • R. GehlhaarAffiliated withInstitut für Angewandte Photophysik, Technische Universität Dresden Email author 
  • , M. SwobodaAffiliated withInstitut für Angewandte Photophysik, Technische Universität Dresden
  • , M. SudziusAffiliated withInstitut für Angewandte Photophysik, Technische Universität Dresden
  • , M. HoffmannAffiliated withInstitut für Angewandte Photophysik, Technische Universität Dresden
  • , H. FröbAffiliated withInstitut für Angewandte Photophysik, Technische Universität Dresden
  • , V.G. LyssenkoAffiliated withInstitut für Angewandte Photophysik, Technische Universität Dresden
  • , K. LeoAffiliated withInstitut für Angewandte Photophysik, Technische Universität Dresden

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Abstract

We report on the dynamics of laser emission from an anisotropic organic microcavity filled with the guest-host composite of tris-(8-hydroxy quinoline) aluminium (Alq3) and 4-(dicyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran (DCM). In a single microcavity, a linesplitting of 0.18 THz between two perpendicularly polarized laser modes is observed. We ascribe this effect to an optical anisotropy in the distributed Bragg reflectors surrounding the organic layer. The temporal behavior of the electromagnetic field is studied by an up-conversion technique and shows an optical beating of 0.18 THz. Two modeling approaches are used to gain insight in the temporal evolution and phase behavior of the two modes. Both point towards the presence of a phase-coupling mechanism in this system.