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Q: Quantenoptik und Photonik

Q 6: Halbleiterlaser

Q 6.3: Talk

Monday, March 13, 2006, 11:40–11:55, HIV

Terahertz-modulated emission from an organic VCSEL — •M. Swoboda¹, M. Koschorreck², R. Gehlhaar¹, V. G. Lyssenko¹, M. Sudzius¹, H. Fröb¹, M. Hoffmann¹, and K. Leo¹ — ¹Institut für Angewandte Photophysik, Technische Universität Dresden, 01062 Dresden, Germany, www.iapp.de — ²ICFO - Institut de Ciències Fotòniques, Jordi Girona 29, Nexus II, 08034 - Barcelona, Spain

We measure the emission dynamics of an optically pumped high-Q organic vertical-cavity surface-emitting laser (VCSEL). As active material, we use the organic semiconductor composite of tris-(8-hydroxy quinoline) aluminium (Alq₃) and 4-(dicyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran (DCM). A rate equation model describes the dynamics [1]. Due to optical anisotropy in the dielectric mirror layers, two perpendicularly polarized laser lines appear. An upconversion experiment provides a 400 fs temporal resolution. The observed line splitting of 0.18 THz results in a modulation of the laser emission at 5.5 ps period time and is also modelled using a rate equation approach.

[1] M. Koschorreck et al. Dynamics of a high-q vertical cavity organic laser.
Appl. Phys. Lett., 87,181108,(2005)