Broadband transparent Huygens' spaceplates

Francisco J. Díaz Fernández*, Luis Manuel Máñez-Espina, Ana Diaz Rubio, Viktar Asadchy

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

Spaceplates have emerged in the context of nonlocal metasurfaces, enabling the compression of optical systems by minimizing the required empty space between their components. In this work, we design and analyze spaceplates that support resonances with opposite symmetries, operating under the so-called Huygens’ condition. Using the temporal coupled-mode theory, we demonstrate that the spatial compression provided by Huygens’ spaceplates is twice that of conventional single-resonance counterparts. Additionally, they can support broader operational bandwidths and numerical apertures, facilitating the reduction of chromatic aberrations. Moreover, Huygens’ spaceplates maintain nearly full transparency over a wide frequency and angular range, allowing their straightforward cascading for multi-frequency broadband operation. Finally, we propose a physical implementation of a Huygens’ spaceplate for optical frequencies based on a photonic crystal slab geometry.
Original languageEnglish
Article number30
Number of pages7
Journalnpj Nanophotonics
Volume1
DOIs
Publication statusPublished - 2024
MoE publication typeA1 Journal article-refereed

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