Paper 13111-51
Paper 13111-51
Cathodoluminescence spectroscopy of two-dimensional materials: self-hybridized exciton polaritons and two-dimensional metals (Invited Paper)
21 August 2024 • 3:30 PM - 3:55 PM PDT | Conv. Ctr. Room 4
Abstract
Polaritons in two-dimensional materials are quasiparticles resulting from the strong interaction between photons and specific material excitations. These robust interactions find crucial applications in strong-field physics, facilitating the manipulation of optical excitations and the control of material excitations. This study focuses on two types of polaritons: self-hybridized surface and bulk exciton polaritons in Bi2Se3, WSe2, and two-dimensional Ruddlesden Popper perovskites, as well as in-plane plasmon polaritons in a novel two-dimensional material, namely borophene. Utilizing deep-sub-wavelength cathodoluminescence spectroscopy and all-optical dark-field spectroscopy, our findings reveal that exciton polaritons in WSe2 exhibit a notably short range, while two-dimensional Ruddlesden Popper perovskites support exceptionally long-range exciton polaritons. Furthermore, we investigate borophene excitations in the visible range and demonstrate its capability to host two-dimensional in-plane hyperbolic plasmon polaritons.
Presenter
Christian-Albrechts-Univ. zu Kiel (Germany)
Nahid Talebi graduated from Tehran University with a PhD in Electrical Engineering in 2011, defended with distinction. In 2012, she joined the Max-Planck Institute for Intelligent Systems as an Alexander von Humboldt Research Fellow. In 2015, she became a group leader at the Max Planck Institute for Solid State Research and in 2018, she received an ERC Starting Grant from the European Research Council. In 2019, she joined the Christian Albrechts University in Kiel as an associate professor and a director of the Institute for Experimental and Applied Physics, holding the chair for Nanooptics. Her work concerns exploring the interaction of electron beams with light and nanostructures, to both investigate fundamental quantum mechanical aspects of electron-light interaction and to propose and realize novel characterization techniques with electron beams.