Berlin 2001 – scientific programme
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Q: Quantenoptik
Q 0: Postdeadline: Talks
Q 0.7: Talk
Tuesday, April 3, 2001, 20:30–20:40, H 104
Travelling-Wave Lasing of some Triphenylamine Dimer -Phenylenevinylene Polymers — •W. Holzer1, A. Penzkofer1, H. Tillmann2, D. Raabe2, and H.-H. Hörhold2 — 1Institut für Experimentelle und Angewandte Physik, Universität Regensburg, Universitätsstrasse 31, D-93053 Regensburg — 2Innovent e. V. und Institut für Organische Chemie und Makromolekulare Chemie der Universität Jena, Humboldtstrasse 10, D-07743 Jena
Travelling-wave lasing (amplification of spontaneous emission) is reported on four triphenylamine dimer - phenylenevinylene polymer (TPD-PPV) neat films on glass substrates. The samples are transversally pumped with picosecond laser pulses (wavelength 347.15 nm, duration 35 ps). Lasing occurs at 536 nm for TPD-DOO-PPV, at 540 nm for for CN-TPD-DOO-PPV, at 571 nm for TPD(4M)-MEH-PPV, and at 618 nm for TPD(4M)-M3EH-PPV. The threshold pump pulse energy densities are determined and the laser output saturation at high excitation energy densities is studied. The length of effective amplification of spontaneous emission is determined. Effective stimulated emission cross-sections are derived from the pump pulse energy density dependent spectral narrowing of the amplified emission signals.