Exciton-polaritons: from condensation to quantum nonlinearity

DIPC Seminars

Vinod Menon
City College and Graduate Center of CUNY, USA
On-site seminar: Donostia International Physics Center
Javier Aizpurua
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Exciton-polaritons: from condensation to quantum nonlinearity

Strong light-matter interaction in excitonic materials results in the formation of half-light half-matter quasiparticles called exciton-polaritons (EP) that take on the properties of both its constituents. In this talk I will first introduce the concept of strong light-matter coupling in optical cavities. Following this, I will discuss our recent work on realizing Bose Einstein like condensates using organic molecular EPs at room temperature [1].
In the second part of my talk, I will discuss polariton nonlinearity in 2D transition metal dichalcogenides with the motivation to achieve nonlinearity at the single photon limit [2]. I will conclude with a brief discussion on our recent work on exciton-photon-magnon coupling in van der Waals magnets and the potential of cavity coupling as a means to engineer materials [3].

[1] "A plug-and-play molecular approach for room temperature polariton condensation," P. Deshmukh, S. Satapathy et al., arXiv:2304.11608 (2023)
[2] "Highly nonlinear dipolar exciton-polaritons in bilayer MoS2," B. Datta et al., Nature Comm. vol. 13 p.6341 (2022)
[3] "Cavity-controlled magneto-optical properties of a strongly coupled van der Waals magnet," F. Dirnberger et al., arXiv:2301.07593 (2023) - In Press Nature

Host: Javier Aizpurua