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Analysis of Ultra-Broadband Absorber with Multilayer Structure in Visible to Near Infrared Light
David Yang1, Ling-Chieh Tseng 2, Wei-Zheng Li2 and Cheng-Fu Yang3*
1School of Electronic Information and Electrical Engineering, Huizhou University, Huizhou 516007, China
2Department of Chemical and Materials Engineering, National University of Kaohsiung, Kaohsiung 811, Taiwan
3Department of Aeronautical Engineering, Chaoyang University of Technology, Taichung 413, Taiwan
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Abstract:
We have designed an absorber with ultra-broadband absorption spanning from visible light to near-infrared light. The performance of the designed absorber was validated with numerical analysis using the COMSOL simulation software. The absorber structure consists of two layers of square cubes stacked on top of four layers of continuous flat films. Starting from the top, the structure consists of an aluminum oxide (Al2O3) and titanium (Ti) cube, followed by a four-layer continuous planar film consisting of poly N-isopropyl acrylamide (PNIPAAm), titanium (Ti), silicon dioxide (SiO2), and titanium (Ti). The simulation analysis results indicated the exceptional performance of this absorber in terms of ultra-broadband. Its high absorption rate was attributed to several factors. Firstly, the top alumina layer exhibits anti-reflection properties, which minimize reflection losses. Secondly, the absorber incorporates three different resonances: local surface plasmon resonance, propagating surface plasmon resonance, and Fabry-Perot cavity resonance. These resonances coexisted within the designed absorber, and at least two of them occurred simultaneously. Thirdly, the formation of two Fabry-Perot cavities within PNIPAAm and silica dielectric layers contributed to the overall performance. The combined effects of anti-reflection, multiple resonances, and the presence of Fabry-Perot cavities enabled the absorber to achieve ultra-broadband absorption and a high absorption rate. Overall, the designed absorber demonstrated remarkable characteristics in absorbing a wide range of wavelengths, from visible light to near-infrared light, while maintaining a high absorption efficiency.
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Keywords: Ultra-broadband; Absorber; COMSOL; Fabry-Perot resonator; Localized surface plasmon resonance
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Received:January 29, 2023; Revised:February 20, 2023; Accepted:February 27, 2023; Published:March 30, 2023
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*Corresponding author; e-mail: cfyang@nuk.ecu.tw
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Citation:Yang, D.; Tseng, L.C.; Li, W.Z.; Yang, C.F.Analysis of Ultra-Broadband Absorber with Multilayer Structure in Visible to Near Infrared Light. Applied Functional Materials 2023, 3, 25-33. https://doi.org/10.35745/afm2023v03.01.0003
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Copyright: ©
2023
The Author(s). Published with license by IIKII, Singapore. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (CC BY), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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