"Strong exciton-photon interaction in van der Waals materials"

Speaker: Vinod Menon, City College of New York

Abstract:
"Strong exciton-photon interaction results in the formation of half-light half-matter quasiparticles called exciton-polaritons (EPs) that take on the properties of both its constituents. In this talk, I will first introduce polariton formation in 2D semiconductors [1] followed by a discussion of Rydberg excitons [2] and dipolar excitons [3] to realize highly nonlinear interactions to achieve polariton blockade. Following this, I will discuss the use of strain to control exciton flow and nonlinear response [4]. Finally, I will present some recent results on EPs in correlated van der Waals materials and their potential to realize hybridization between excitons, photons and magnons.

[1] X. Liu et al., Nat. Photonics 9, 30 (2015).
[2] J. Gu et al., Nat. Commun. 12, 2269 (2021).
[3] B. Datta et al., ArXiv2110.13326 (2021).
[4] F. Dirnberger et al., Sci. Adv. 7, 3066 (2021)."

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