Infrared Metasurface with a Top Cross-Square Nanobrick Array for Realizing a Highly Efficient Lightwave Absorption Across a Broad Wavelength Region.
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| Title: | Infrared Metasurface with a Top Cross-Square Nanobrick Array for Realizing a Highly Efficient Lightwave Absorption Across a Broad Wavelength Region. |
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| Authors: | Chen, Han1,2 (AUTHOR), Ji, Wuyang1,2 (AUTHOR), Zhang, Chuang1,2,3 (AUTHOR), Shao, Xuan1,2 (AUTHOR), Yao, Xinzhe1,2 (AUTHOR), You, Fangchen1,2 (AUTHOR), Wang, Haiwei3 (AUTHOR), Zhang, Xinyu1,2 (AUTHOR) x_yzhang@hust.edu.cn |
| Source: | Materials (1996-1944). Mar2026, Vol. 19 Issue 6, p1114. 14p. |
| Subjects: | Light absorption, Electromagnetic shielding, Resonance, Surface plasmons, Wavelengths, Infrared radiation |
| Abstract: | A type of metasurface with a top cross-square nanobrick (CSNB) array is proposed for realizing a highly efficient infrared (IR) radiation absorption across a broad wavelength region covering three traditional atmospheric windows. The metasurface is successfully constructed by integrating a layered CSNB array over a composite dielectric bottom supported by a common silicon substrate. The metasurface sample experimentally exhibits an average radiation absorptivity of more than 86% and a very low transmittance of less than 2% in the 1.28–14 μm wavelength region measured. A polarized absorption sensibility of the incident lightwaves and an average IR absorptivity of more than 80% with an oblique incidence at 40° are also demonstrated. The strong broad IR absorption with a negligible radiation transmission can be attributed to the existence of an obvious electromagnetic shielding action of the nanocavity formed between adjacent titanium films, and further, the near-field lightwave excitation upon the CSNBs of the metasurface charged by incident lightwaves satisfying the resonant condition needed. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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