Rahimi-Iman, A.Schneider, C.Fischer, J.Holzinger, S.Amthor, M.Worschech, L.Reitzenstein, StephanHöfling, S.Forchel, A.Kamp, M.2022-03-092022-03-0920131742-6588https://depositonce.tu-berlin.de/handle/11303/16513http://dx.doi.org/10.14279/depositonce-15290We report on pronounced magneto-optical effects of trapped polariton modes in a single InGaAs quantum well microresonator with a lithographically defined modulation of the cavity length. In our optical polariton traps with diameters ranging from 1 to 10 μm, a confinement potential of 7.5 meV is achieved. In magnetic-field dependent experiments, a diamagnetic shift and a Zeeman splitting of the trap-modes are observed which confirms that the polaritonic nature of the quantized emission modes are preserved even for traps as small as 1 μm. Furthermore, focusing on theoretical estimates using a simple model, we have identified a clear correlation between the polaritons' magnetic response and their excitonic fraction, corresponding to the Hopfield coefficients of the composite particles.en530 Physikquantum-well exciton-polaritonsmagnetic-field interactionmagneto-optical effectstrapped polariton modesmicroresonatorsArticle2022-02-231742-6596