Title

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

Authors

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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