Dynamics of optical vortices in Van der Waals materials

T. Bucher; Y. Kurman; K. Wang; Q. Yan; A. Niedermayr; R. Ruimy; H. Nahari; R. Dahan; H. Herzig Sheinfux; G. M. Vanacore; I. Kaminer

doi:10.1117/12.3028729

2 October 2024 Dynamics of optical vortices in Van der Waals materials

T. Bucher, Y. Kurman, K. Wang, Q. Yan, A. Niedermayr, R. Ruimy, H. Nahari, R. Dahan, H. Herzig Sheinfux, G. M. Vanacore, I. Kaminer

Author Affiliations +

Proceedings Volume 13110, Active Photonic Platforms (APP) 2024; 1311002 (2024) https://doi.org/10.1117/12.3028729
Event: Nanoscience + Engineering, 2024, San Diego, California, United States

Abstract

Recent advancements in ultrafast electron microscopy have provided direct access to polariton dynamics, visualizing such dynamics in space and time. This work presents new experimental results revealing a myriad of phenomena involving interactions of vortex-anti-vortex pairs, their creation and annihilation. We show new behaviors that became accessible thanks to a new development in electron microscopy - Free-Electron Ramsey Imaging (FERI) - which enabled extracting both the sub-cycle and group dynamics of polariton wavepackets. Our demonstrations involve optical phonon-polaritons in hexagonal boron nitride (hBN) and Molybdenum oxide, renowned for their unique dispersion and novel wavepacket propagations behaviors. These discoveries not only enhance our understanding of vortex phenomena across various systems, but also offer promising avenues for accessing new kinds of light-matter interactions.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

T. Bucher, Y. Kurman, K. Wang, Q. Yan, A. Niedermayr, R. Ruimy, H. Nahari, R. Dahan, H. Herzig Sheinfux, G. M. Vanacore, and I. Kaminer "Dynamics of optical vortices in Van der Waals materials", Proc. SPIE 13110, Active Photonic Platforms (APP) 2024, 1311002 (2 October 2024); https://doi.org/10.1117/12.3028729

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