Regensburg 2016 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 44: Optical Properties I

HL 44.5: Vortrag

Mittwoch, 9. März 2016, 10:45–11:00, H10

DIP: Organic Small Molecules for Strong Coupling — •Felix Lemke, Hartmut Fröb, and Karl Leo — Institut für Angewandte Photophysik, TU Dresden, Germany

Due to recent reports on polariton lasing with reduced threshold compared to conventional lasing, the investigation of strong coupling is of large interest. Organic molecules are promising candidates for studying light matter interaction due to their high exciton binding energy, creating a large polaritonic splitting. Since organic molecules are often unstable, there is ongoing research on small, thermally evaporable organic molecules for strong coupling.

In this work, we discuss Bu4-Ph4-DIP evaporated in between two mirrors to form a microcavity. Reflection measurements of different sample structures (one DBR/one metal mirror or two metal mirrors) are presented, showing a splitting between both polariton branches of several tens of meV. In the structure made of two metal mirrors, even a third branch arising from higher vibronic states of the molecule can be identified. The measurements are compared to calculations based on the transfer matrix algorithm.