Broadband Plasmonic Metamaterial Optical Absorber for the Visible to Near-Infrared Region


Musa, Ahmad and Alam, Touhidul and Islam, Mohammad Tariqul and Hakim, Mohammad Lutful and Rmili, Hatem and Alshammari, Ahmed S. and Islam, Md. Shabiul and Soliman, Mohamed S. (2023) Broadband Plasmonic Metamaterial Optical Absorber for the Visible to Near-Infrared Region. Nanomaterials, 13 (4). p. 626. ISSN 2079-4991

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An oblique angle and polarization insensitive metamaterial absorber (MA) are highly desired for the visible and infrared optical applications like, wave energy harvesting, optical filters, and detecting thermal leaks and electrical defects. In this paper, a multi-layered MA consisting of two layers of tungsten resonators on a silicon dioxide substrate, coated with additional SiO2 materials is investigated. The unit cell size of the MA is 0.5λ × 0.5λ × 0.8λ, at the lowest wavelength. The proposed MA offers an average absorption of 92% from 400 nm to 2400 nm with stable oblique incident angles up to 45°. The structure also achieves polarization insensitivity at the entire visible and near-infrared spectrum. Moreover, the MA is found highly compatible for solar absorber applications with high y AAM1.5. The structure is also compatible for filter application in optical communication system by modifying the plasmonic nano structure. The modified structure can block the wavelengths of the visible band (450 nm to 800 nm) and transmit optical communication bands (800 to 1675 nm). These versatile absorption and filtering performance make the proposed design highly potential for solar energy harvesting, photodetection, thermal imaging, photo-trapping, and optical communications applications.

Item Type: Article
Uncontrolled Keywords: Metamaterial absorber; nanoarchitecture; optical window; infrared window; photon conversion; energy harvesting
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK452-454.4 Electric apparatus and materials. Electric circuits. Electric networks
Divisions: Faculty of Engineering (FOE)
Depositing User: Ms Nurul Iqtiani Ahmad
Date Deposited: 11 Apr 2023 01:12
Last Modified: 11 Apr 2023 01:12


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