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

Research output: Contribution to journalJournal article – Annual report year: 2013Researchpeer-review

  • Author: Liu, Xin

    Karlsruhe Institute of Technology, Germany

  • Author: Klinkhammer, Sönke

    Karlsruhe Institute of Technology, Germany

  • Author: Wang, Ziyao

    Karlsruhe Institute of Technology, Germany

  • Author: Wienhold, Tobias

    Karlsruhe Institute of Technology, Germany

  • Author: Vannahme, Christoph

    Optofluidics, Department of Micro- and Nanotechnology, Technical University of Denmark, Ørsteds Plads, 2800, Kgs. Lyngby, Denmark

  • Author: Jakobs, Peter-Jürgen

    Karlsruhe Institute of Technology, Germany

  • Author: Bacher, Andreas

    Karlsruhe Institute of Technology, Germany

  • Author: Muslija, Alban

    Karlsruhe Institute of Technology, Germany

  • Author: Mappes, Timo

    Karlsruhe Institute of Technology, Germany

  • Author: Lemmer, Uli

    Karlsruhe Institute of Technology, Germany

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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.
Original languageEnglish
JournalOptics Express
Volume21
Issue number23
Pages (from-to)27697-27706
ISSN1094-4087
DOIs
Publication statusPublished - 2013

Bibliographical note

© 2013 OSA

CitationsWeb of Science® Times Cited: No match on DOI

    Research areas

  • Pumping (laser), Distributed feedback lasers

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