Dresden 2020 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 75: Poster IIIB

HL 75.10: Poster

Thursday, March 19, 2020, 15:00–17:30, P2/3OG

Open optical microcavities for tunable light–matter coupling with 2D semiconductors — •Chirag Palekar, Franziska Wall, Oliver Mey, Lorenz Maximilian Schneider, and Arash Rahimi-Iman — Faculty of Physics and Materials Sciences Center, Philipps-Universität Marburg, Marburg, 35032, Germany

Light–matter coupling experiments with 2D semiconductors such as transition-metal dichalcogenides in optical microcavities are very attractive due to the strong excitonic binding energies, spin–valley locking and the overall prospect of polariton Bose condensation at elevated temperatures. In this context, microcavities with tunable length, low mode volume and open resonator configuration can be very useful for the systematic variation of the system’s parameters [1]. Moreover, tuning between the weak and strong coupling regime becomes feasible, as discussed here based on our simulations. We use the transfer-matrix method to show how to tailor and alter the coupling strength actively by varying the relative field strength at the excitons’ position. Therefore, a transparent PMMA spacer layer and angle-dependencies of optical resonances are exploited [2]. The adjustable polariton energy levels could be interesting for polariton chemistry or optical sensing. In addition, cavities that allow working at the exceptional point promise the exploration of topological properties of that point. [1] P. Qing et al., APL 114, 021106 (2019). [2] F. Wall et al., arXiv (2019).