Vinod Menon1,2
The City College of New York1,Graduate Center, The City University of New York2
Vinod Menon1,2
The City College of New York1,Graduate Center, The City University of New York2
van der Waals (vdW) magnets that host electronic excitations (excitons) correlated to the magnetic order present a unique opportunity to realize strongly coupled magneto-exciton-polaritons and thereby manipulate electronic and spin degrees of freedom via light. Here we report our recent work on such strongly coupled polaritons that show signatures of the underlying magnetic order. Specifically, we will discuss the formation of polaritons in antiferromagnetic insulator NiPS3 and the use of polariton nonlinear spectroscopy to shed light on the nature of excitons in this system [1]. Following this, we will present our work on magnetic semiconductor, CrSBr where the excitons are naturally dressed by photons forming self-hybridized polaritons. We demonstrate the signature of coherent magnon oscillations on these polaritons and the potential to modify magneto-optical response by tuning the photon fraction of the polariton states [2].<br/>[1] “Observation of spin-correlated exciton-polaritons in a van der Waals magnet, F. Dirnberger, et al. Nature Nanotechnology 17, 1060 (2022).<br/>[2] “Cavity-controlled magneto-optical properties of a strongly coupled van der Waals magnet,” F. Dirnberger et al. <i>arXiv:2301.07593 </i>(2023) [in press - Nature].