Lasing action in two-dimensional organic photonic crystal lasers with hexagonal symmetry

    Authors

    K. Forberich; M. Diem; J. Crewett; U. Lemmer; A. Gombert;K. Busch

    Comments

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    Abbreviated Journal Title

    Appl. Phys. B-Lasers Opt.

    Keywords

    Optics; Physics, Applied

    Abstract

    We investigate fluorescence and lasing action from strongly modulated two-dimensional surface relief structures with hexagonal symmetry onto which thin films of optically active organic material have been deposited. As compared with second-order laser structures with square symmetry, these organic photonic crystal lasers exhibit unusual feedback mechanisms. As a result, we observe surface-emitting lasing action with a central beam normal to the surface and a hexagonal emission pattern of side-beams whose direction slightly deviates from the normal. A corresponding theoretical analysis allows us to determine the photonic bandstructure and the low-threshold laser modes in this system. These results agree very well with fluorescence data and confirm the hexagonal lasing pattern and the corresponding emission angles.

    Journal Title

    Applied Physics B-Lasers and Optics

    Volume

    82

    Issue/Number

    4

    Publication Date

    1-1-2006

    Document Type

    Article

    Language

    English

    First Page

    539

    Last Page

    541

    WOS Identifier

    WOS:000235368400007

    ISSN

    0946-2171

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