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Laser modes in organic solid-state distributed feedback lasers |
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| Authors: | S. Riechel U. Lemmer J. Feldmann T. Benstem W. Kowalsky U. Scherf A. Gombert V. Wittwer |
| Affiliation: | Lehrstuhl für Photonik und Optoelektronik, Sektion Physik und CeNS, Ludwig-Maximilians-Universit?t, Amalienstr. 54, 80799 München, Germany, DE Institut für Hochfrequenztechnik der TU Braunschweig, Schleinitzstr. 23 A, 38106 Braunschweig, Germany, DE Max-Planck-Institut für Polymerforschung, Ackermannweg 10, 55128 Mainz, Germany, DE Fraunhofer Institut für Solare Energiesysteme, Oltmannstr. 5, 79100 Freiburg, Germany, DE |
| Abstract: | We report on the laser modes in optically pumped solid-state lasers using an electroluminescent organic semiconductor as the active medium. Mechanically flexible distributed-feedback lasers are fabricated by depositing a thin film of an active material onto a nano-patterned polyester substrate either via spin-coating of a soluble ladder-type poly(p-phenylene) or via vacuum co-sublimation of small organic molecules. The different surface texture resulting from the fabrication process causes different feedback mechanisms. In both lasers higher lateral modes give rise to a broadening of the laser spectra at higher pumping levels. Received: 7 August 2000 / Revised version: 12 September 2000 / Published online: 8 November 2000 |
| Keywords: | PACS: 42.60.DA 42.60.JF 42.70.JK |
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