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Lasing mechanisms in organic photonic crystal lasers with two-dimensional distributed feedback



Journal of applied physics 100 (2006), Nr.2, Art. 023110, 6 S.
ISSN: 0021-8979
ISSN: 1089-7550
Fraunhofer ISE ()

We present a detailed experimental and theoretical investigation of the lasing characteristics of organic photonic crystal lasers. These lasers are based on strongly modulated two-dimensional polymer surface relief structures on which thin films of optically active organic materials have been deposited. We determine the in-plane photonic band structure of the corresponding quasiguided modes within an effective two-dimensional model. In addition, we calculate the total (three-dimensional) losses associated with these modes. This allows us to identify the lasing thresholds for square lattice geometries and to understand the emission pattern.