Dynamics of optical vortices in Van der Waals materials

被引：0

作者：

Bucher, T. ^{[1
]}

Kurman, Y. ^{[1
]}

Wang, K. ^{[2
]}

Yan, Q. ^{[1
]}

Niedermayr, A. ^{[1
]}

Ruimy, R. ^{[1
]}

Nahari, H. ^{[1
]}

Dahan, R. ^{[1
]}

Shienfux, H. Herzig ^{[3
]}

Vanacore, G. M. ^{[4
]}

Kaminer, I. ^{[1
]}

机构：

[1] Technion Israel Inst Technol, Andrew & Erna Viterbi Fac Elect & Comp Engn, Haifa, Israel

[2] Shanghai Inst Opt & Fine Mech, Shanghai, Peoples R China

[3] Bar Ilan Univ, Dept Phys, Ramat Gan, Israel

[4] Univ Milano Bicocca, Dept Mat Sci, Milan, Italy

来源：

ACTIVE PHOTONIC PLATFORMS, APP 2024 | 2024年 / 13110卷

关键词：

Ultrafast electron microscopy; Optical singularities; Light-matter interactions; Polariton dynamics; POLARITONS; ELECTRONS; LIGHT;

D O I：

10.1117/12.3028729

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页数：7

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