Broadband transparency in terahertz free-standing anapole metasurface

We report on an all-dielectric compound anapole metasurface featuring metaatoms based on concentric disks and rings arranged in a square lattice. In this free-standing metasurface, the radiating multipole components cancel each other out in the far field, regardless of the angle of incidence and the polarization of incoming radiation. To demonstrate experimentally a broadband transparency in the terahertz range, we fabricated a silicon metasurface with a total thickness of 60 μm using electron beam lithography and plasma deep etching techniques. Terahertz time-domain spectroscopy experiments revealed that the transmittance spectra measured at various incident angles and polarization states agree well with the respective modeling data. The proposed compound anapole approach has strong application potential for broadband terahertz photonics and sensing devices.

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Publication Details

Journal
Applied Physics Letters
Published
2024-12-23
DOI
https://doi.org/10.1063/5.0246993
Citations
4
Primary Topic
Metamaterials and Metasurfaces Applications
Type
article
Field-Weighted Citation Impact
0.47

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article

Broadband transparency in terahertz free-standing anapole metasurface

Yuri Svirko, Surya Revanth Ayyagari, P. Kuzhir, Alexey A. Basharin et al.
4 citations
Applied Physics Letters
Metamaterials and Metasurfaces Applications
0.47
article

Broadband transparency in terahertz free-standing anapole metasurface

Yuri Svirko, Surya Revanth Ayyagari, P. Kuzhir, Alexey A. Basharin, Isaac Appiah Otoo, Andrzej Urbanowicz, Irmantas Kašalynas, Georgy Fedorov, Petri Karvinen, Justinas Jorudas, Daniil Pashnev, G. Matveev
article en
4 citations

Abstract

We report on an all-dielectric compound anapole metasurface featuring metaatoms based on concentric disks and rings arranged in a square lattice. In this free-standing metasurface, the radiating multipole components cancel each other out in the far field, regardless of the angle of incidence and the polarization of incoming radiation. To demonstrate experimentally a broadband transparency in the terahertz range, we fabricated a silicon metasurface with a total thickness of 60 μm using electron beam lithography and plasma deep etching techniques. Terahertz time-domain spectroscopy experiments revealed that the transmittance spectra measured at various incident angles and polarization states agree well with the respective modeling data. The proposed compound anapole approach has strong application potential for broadband terahertz photonics and sensing devices.

Applied Physics LettersVol. 125(26)
University of Eastern Finland (FI), Center for Physical Sciences and Technology (LT)
Academy of Finland, Horizon 2020 Framework Programme
Sustainable cities and communities
Openalex Percentile: Top 43%
Metamaterials and Metasurfaces Applications
0.47
DOIOpen Access PDFOpenAlex
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Broadband transparency in terahertz free-standing anapole metasurface — Yuri Svirko, Surya Revanth Ayyagari, et al. · Applied Physics Letters (2024) | TGRS Research Map | TGRS