Causality Implications for Absorption by EM Metasurfaces

A causal electromagnetic (EM) metasurface is backed by a lossless substrate and partially absorbs obliquely incoming rays. The integral of the absorbed power along the entire frequency axis is analytically evaluated, and the obtained sum rules indicate the global absorption by such a generic configu...

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Bibliographic Details
Main Author: Constantinos Valagiannopoulos
Format: Article
Language:English
Published: MDPI AG 2025-05-01
Series:Nanomaterials
Subjects:
Online Access:https://www.mdpi.com/2079-4991/15/11/793
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