Low-threshold conical microcavity dye lasers

Tobias Grossmann, Simone Schleede, Mario Hauser, Mads Brøkner Christiansen, Christoph Vannahme, Carsten Eschenbaum, Sönke Klinkhammer, Torsten Beck, Jochen Fuchs, Ulrich G. Nienhaus, Uli Lemmer, Anders Kristensen, Timo Mappes, Heinz Kalt

    Research output: Contribution to journalJournal articleResearchpeer-review


    We report on lasing in rhodamine 6G-doped, conical polymeric microcavities with high quality factors fabricated on a silicon substrate. Threshold pump energies as low as 3 nJ are achieved by free-space excitation in the quasistationary pumping regime with lasing wavelengths around 600 nm. Finite element simulations confirm that lasing occurs in whispering gallery modes which corresponds well to the measured multimode laser-emission. The effect of dye concentration on lasing threshold and lasing wavelength is investigated and can be explained using a standard dye laser model.
    Original languageEnglish
    JournalApplied Physics Letters
    Issue number6
    Publication statusPublished - 2010


    • whispering gallery modes
    • finite element analysis
    • laser cavity resonators
    • dye lasers
    • silicon
    • optical pumping


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