Mid-long-wave infrared broadband absorber based on multi-layer plasma cavities metasurface

Shenghua Duan; Guang Yang; Xinyu Zhang

doi:10.1117/12.2691246

7 March 2024 Mid-long-wave infrared broadband absorber based on multi-layer plasma cavities metasurface

Shenghua Duan, Guang Yang, Xinyu Zhang

Proceedings Volume 13084, MIPPR 2023: Multispectral Image Acquisition, Processing, and Analysis; 1308405 (2024) https://doi.org/10.1117/12.2691246
Event: Twelfth International Symposium on Multispectral Image Processing and Pattern Recognition (MIPPR2023), 2023, Wuhan, China

Abstract

Efficient absorption in the mid-long-wave infrared region is crucial for various applications, including thermal imaging and sensing, infrared spectroscopy, and camouflage. A multilayered metal-insulator-metal-based infrared plasmonic metamaterial absorber utilizing a stacked nanocavity meta-surface consisting of a double-layer cylindrical metal-insulator-metal structure (DCMIM) is proposed. This absorber demonstrates wideband absorption capabilities with an average absorption rate exceeding 75% in the 3–14μm range. To understand the spectral absorption mechanisms, a comprehensive analysis is conducted using the Finite Difference Time Domain and Fabry-Perot resonance model. The analysis reveals physical mechanisms such as strong coupling between plasmon resonances and phonon vibrations loss from the dielectric spacer, as well as localized surface plasmon resonance. It is worth noting that the quantities of plasma cavities significantly impacts the performance of the absorber. By adjusting the material type and thickness of the film layer, it becomes possible to effectively compensate for the performance limitations of a single dielectric layer material within specific wavelength bands. Experimental results, combined with theoretical analysis of the DCMIM structure, establish a new approach to the design of broadband infrared absorbers.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Shenghua Duan, Guang Yang, and Xinyu Zhang "Mid-long-wave infrared broadband absorber based on multi-layer plasma cavities metasurface", Proc. SPIE 13084, MIPPR 2023: Multispectral Image Acquisition, Processing, and Analysis, 1308405 (7 March 2024); https://doi.org/10.1117/12.2691246

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KEYWORDS

Plasma

Absorption

Infrared radiation

Titanium

Metals

Electric fields

Localized surface plasmon resonances

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