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arXiv · 2410.23291

Space-Time Wedges

Amir Bahrami·Klaas De Kinder·Zhiyu Li·Christophe Caloz
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Abstract

Space-time-modulated systems have attracted significant interest over the past decade due to their ability to manipulate electromagnetic waves in unprecedented ways. Here, we introduce a new type of space-time-modulated structure, the space-time wedge, consisting of two interfaces moving at different velocities, which results in either closing or opening wedges. Using moving boundary conditions, we derive closed-form solutions for the scattering of electromagnetic waves in such a wedge and leverage these solutions to unveil the underlying physics, including multiple space-time scattering and Doppler shifting. The space-time wedge holds potential for various optical and photonic applications.

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Amir Bahrami, Klaas De Kinder, Zhiyu Li, Christophe Caloz. 2024-10-08. Space-Time Wedges. https://arxiv.org/abs/2410.23291

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