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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 23 — Nov. 18, 2013
  • pp: 27697–27706

Pump spot size dependent lasing threshold in organic semiconductor DFB lasers fabricated via nanograting transfer

Xin Liu, Sönke Klinkhammer, Ziyao Wang, Tobias Wienhold, Christoph Vannahme, Peter-Jürgen Jakobs, Andreas Bacher, Alban Muslija, Timo Mappes, and Uli Lemmer  »View Author Affiliations

Optics Express, Vol. 21, Issue 23, pp. 27697-27706 (2013)

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Optically excited organic semiconductor distributed feedback (DFB) lasers enable efficient lasing in the visible spectrum. Here, we report on the rapid and parallel fabrication of DFB lasers via transferring a nanograting structure from a flexible mold onto an unstructured film of the organic gain material. This geometrically well-defined structure allows for a systematic investigation of the laser threshold behavior. The laser thresholds for these devices show a strong dependence on the pump spot diameter. This experimental finding is in good qualitative agreement with calculations based on coupled-wave theory. With further investigations on various DFB laser geometries prepared by different routes and based on different organic gain materials, we found that these findings are quite general. This is important for the comparison of threshold values of various devices characterized under different excitation areas.

© 2013 Optical Society of America

OCIS Codes
(140.3430) Lasers and laser optics : Laser theory
(140.3490) Lasers and laser optics : Lasers, distributed-feedback
(140.7300) Lasers and laser optics : Visible lasers

ToC Category:
Lasers and Laser Optics

Original Manuscript: October 14, 2013
Manuscript Accepted: October 21, 2013
Published: November 4, 2013

Xin Liu, Sönke Klinkhammer, Ziyao Wang, Tobias Wienhold, Christoph Vannahme, Peter-Jürgen Jakobs, Andreas Bacher, Alban Muslija, Timo Mappes, and Uli Lemmer, "Pump spot size dependent lasing threshold in organic semiconductor DFB lasers fabricated via nanograting transfer," Opt. Express 21, 27697-27706 (2013)

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