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Vol. 32, No. 8(2), S&M2292

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Sensors and Materials, Volume 37, Number 8(3) (2025)
Copyright(C) MYU K.K.
pp. 3697-3706
S&M4146 Research paper of Special Issue
https://doi.org/10.18494/SAM5827
Published: August 21, 2025

Multilayer Metamaterial-based Absorber with Ultra-wideband Performance from Visible to Mid-infrared Range [PDF]

Lin Wang, Chia-Min Ho, Chin-Ta Chen, Cheng-Fu Yang, and Kao-Wei Min

(Received June 22, 2025; Accepted August 6, 2025)

Keywords: multilayer, metamaterial-based absorber, ultra-wideband, visible, mid-infrared

An absorber capable of operating across the visible to mid-infrared spectrum holds tremendous promise for a wide range of sensor applications, including thermal imaging, environmental monitoring, infrared stealth, and broadband photodetection. In this study, we present the design of a high-performance multilayer metamaterial-based absorber that achieves ultra-wideband absorption through a carefully optimized layered structure. The absorber comprises a vertically stacked configuration consisting of alternating metallic and dielectric layers. From bottom to top, the structure includes an iron (Fe) substrate, followed by an h1 Fe layer (substrate), h2 Cu2O layer, h3 Fe layer, h4 Cu2O layer, h5 Fe layer, and h6 Cu2O layer, and a topmost h7 Ti cylindrical matrix array. This design combines lossy metal layers with dielectric spacers to generate strong plasmonic resonances and constructive interference across a broad spectrum. Fe provides high intrinsic loss and low-cost fabrication, while Cu2O acts as the dielectric layer to enhance field confinement and improve impedance matching. A patterned Ti cylindrical array on the top surface creates localized surface plasmon resonances and scatters light into the structure, further increasing absorption. Simulations show that the absorber achieves high absorptivity over a wide wavelength range, from around 620 nm in the visible to 7200 nm in the mid-infrared. The results highlight the potential of this multilayer metamaterial design for integration into next-generation optoelectronic and sensing systems requiring compact, efficient, and broadband light absorption.

Corresponding author: Cheng-Fu Yang and Kao-Wei Min


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Cite this article
Lin Wang, Chia-Min Ho, Chin-Ta Chen, Cheng-Fu Yang, and Kao-Wei Min, Multilayer Metamaterial-based Absorber with Ultra-wideband Performance from Visible to Mid-infrared Range, Sens. Mater., Vol. 37, No. 8, 2025, p. 3697-3706.



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