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Proceedings Paper

THz oscillations from organic microcavity laser emission
Author(s): Marko Swoboda; Robert Gehlhaar; Markas Sudzius; Vadim G. Lyssenko; Michael Hoffmann; Karl Leo
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Paper Abstract

We report on the experimental observation of polarization splitting and terahertz oscillations in transmission and laser emission from optically anisotropic microcavities. A guest-host composite of tris-(8-hydroxyquinoline) aluminium (Alq3) and 4-(dicyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran (DCM) serves as active laser material. The anisotropy is attributed to oblique columnar structures in the distributed Bragg reflector mirrors of our microcavity, resulting from sample fabrication. A splitting of 0.2 nm occurs in the laser emission from an organic vertical cavity surface emitting laser at a wavelength of 612.6 nm, and a splitting of 2.5nm is obtained from a sample for Ti-Sapphire laser transmission at 781 nm. Split modes are perpendicularly polarized. An upconversion setup allows temporally resolved studies of transmission and emission behavior, showing an oscillation at a frequency of 1.25THz in transmission, and 0.18THz in emission, respectively. The temporal behavior of laser emission is modelled by a set of rate-equations and extended to account for the resulting oscillations. Our observations suggest that a phase-coupling mechanism between both occuring modes is present in the laser emission from our microcavity.

Paper Details

Date Published: 20 April 2006
PDF: 11 pages
Proc. SPIE 6192, Organic Optoelectronics and Photonics II, 61920F (20 April 2006); doi: 10.1117/12.677565
Show Author Affiliations
Marko Swoboda, Technische Univ. Dresden (Germany)
Robert Gehlhaar, Technische Univ. Dresden (Germany)
Markas Sudzius, Technische Univ. Dresden (Germany)
Vadim G. Lyssenko, Technische Univ. Dresden (Germany)
Michael Hoffmann, Technische Univ. Dresden (Germany)
Karl Leo, Technische Univ. Dresden (Germany)

Published in SPIE Proceedings Vol. 6192:
Organic Optoelectronics and Photonics II
Paul L. Heremans; Michele Muccini; Eric A. Meulenkamp, Editor(s)

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