Dresden 2017 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 36: Organic Semiconductors (joined session with CPP, DS)

HL 36.2: Talk

Tuesday, March 21, 2017, 09:45–10:00, POT 251

Polariton bottleneck dynamics in organic microcavities — •Felix Lemke, Hartmut Fröb, and Karl Leo — IAPP, TU Dresden, Germany

Organic molecules are known to be promising candidates for strong coupling experiments due to their large exciton binding energy. Simultaneously, organic materials reveal large inhomogeneously broadened absorption spectra, complicating the investigation. Even so, small organic molecules have advantages in processing, stability (to ambient conditions and high optical excitation) and lifetime.

In this work we will present a method to investigate the microcavity polariton properties utilizing the oligomer Bu4-Ph4-DIP. We perform angle-resolved streak camera measurements and compare the data with a rate-equation model. Simulation and measurement agree very well. From this, we can see directly the influence of the polariton bottleneck, which proofs, that our system is in the strong coupling regime. Moreover, we can extract the characteristic time constants and gain an insight into the polariton dynamics.