Speaker
Description
We investigate a two-dimensional electron system (2DES) embedded in an optical cavity. Cavity photons are strongly coupled to Fermi polarons, which leads to the formation of polaron-polaritons [1, 2, 3]. The light-matter coupling strength is sensitive to the electronic ground state. As the magnetic field is varied, we find that not only the energy of the polariton but also their scattering amplitude is changed.
We observe nonlinear energy shifts in the lower and upper polariton lines at certain 2DES filling factors and concomitant enhancements in the electron-polariton scattering amplitude.
References
[1] S. Ravets, et al., Phys. Rev. Lett. 120, 057401 (2018).
[2] M. Sidler, et al., Nature Phys. 13, 255 (2017).
[3] S. Smolka, et al., Science 346, 332 (2014).
