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Proceedings Paper

Blue-light-emitting polymer lasers with non-periodic circular Bragg resonators
Author(s): Thomas Wellinger; Christof Pflumm; Jing Becker; Thomas Weimann; Mariano Campoy-Quiles; Paul N. Stavrinou; Ulrich Scherf; Donal D. C. Bradley
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Paper Abstract

We present single mode optically pumped lasing from a new resonator structure for polymer lasers employing nonperiodic circular Bragg gratings. Our devices, using a polyfluorene derivative (BN-PFO) as gain medium, are the first blue-emitting circular grating semiconductor lasers (either organic or inorganic). They exhibit feature sizes as small as 47 nm and emit azimuthally polarized beams with a spectral linewidth ≈ 0.2 nm. We find a minimum lasing threshold energy density of 1.2 μJ/cm2 (10 Hz, 8 ns, 355 nm Nd:YAG laser excitation). The quality factor of the resonator modal fields is found to be at least 2200 for these devices.

Paper Details

Date Published: 16 April 2008
PDF: 9 pages
Proc. SPIE 6999, Organic Optoelectronics and Photonics III, 699907 (16 April 2008); doi: 10.1117/12.781033
Show Author Affiliations
Thomas Wellinger, Imperial College London (United Kingdom)
Christof Pflumm, Merck KGaA (Germany)
Jing Becker, Physikalisch-Technische Bundesanstalt (Germany)
Thomas Weimann, Physikalisch-Technische Bundesanstalt (Germany)
Mariano Campoy-Quiles, Imperial College London (United Kingdom)
Paul N. Stavrinou, Imperial College London (United Kingdom)
Ulrich Scherf, Bergische Univ. Wuppertal (Germany)
Donal D. C. Bradley, Imperial College London (United Kingdom)

Published in SPIE Proceedings Vol. 6999:
Organic Optoelectronics and Photonics III
Paul L. Heremans; Michele Muccini; Eric A. Meulenkamp, Editor(s)

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