Abstract
A near-perfect absorber for the visible regime based on metal-dielectric-metal subwavelength grating structure with the refractory metals is designed and demonstrated numerically. The absorber presents an average absorption over 98.4% in the visible regime at normal incidence. Angle-relative analysis shows that the proposed structure has good angle-tolerance. The high average absorption (86.6%) in the visible region can be maintained with the incident angles up to 60°. Through the analysis of the magnetic field, the physical origin is verified that this excellent absorption performance mainly stems from the cooperative effect of surface plasmonic resonances and the intrinsic broadband spectral responses by the refractory metals. In addition, the dependence of the absorption spectrum of the proposed absorber on the structural parameters is analyzed. This work provides an idea for the design of high-performance absorbers and has potential applications in advanced light energy capture and integration systems.
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Funding
The authors acknowledge financial support from the National Natural Science Foundation of China (No. 61505134, 61575133, 61775076, 61405133), the Natural Science Foundation of Jiangsu Province (No. BK20140357), the Key Natural Science Foundation of the Higher Education Institutions of Jiangsu Province (No. 14KJB140014), the Science and Technology Project of Suzhou (No. ZXG201427), Jiangsu Planned Projects for Postdoctoral Research Funds (2020Z116) and the project funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).
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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by WZ, HZ and YZ. The first draft of the manuscript was written by YZ, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Zou, W., Zhang, H. & Zhou, Y. Numerical study of a wide-angle near-perfect absorber for the visible regime incorporating metal-dielectric-metal subwavelength grating structure. J Opt 52, 1238–1244 (2023). https://doi.org/10.1007/s12596-022-00956-3
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DOI: https://doi.org/10.1007/s12596-022-00956-3