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Long-wave infrared polarization-sensitive metamaterial broadband absorber based on ring-grating composite structure.

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Bibliographic Details
Title:	Long-wave infrared polarization-sensitive metamaterial broadband absorber based on ring-grating composite structure.
Authors:	Liu, Yuetao¹ (AUTHOR), Wu, Zhe¹ (AUTHOR), Guo, Siyu¹ (AUTHOR), Wei, Xintong¹ (AUTHOR), Geng, Jizheng¹ (AUTHOR), Liu, Siyu¹ (AUTHOR), Zhu, Shijia¹ (AUTHOR), Sun, Wenwen¹ (AUTHOR), Wang, Wenwen¹ (AUTHOR), Yang, Fuming¹ (AUTHOR), Shi, Xiaoyan¹ (AUTHOR), Liang, Zhongzhu¹ (AUTHOR) liangzz@nenu.edu.cn
Source:	Journal of Physics D: Applied Physics. 2026, Vol. 59 Issue 23, p1-13. 13p.
Subjects:	Infrared absorption, Metamaterials, Infrared heating, Diffraction gratings
Abstract:	Improving absorption, broadening bandwidth, and enhancing polarization sensitivity are central objectives in current research. We propose a long-wave infrared metamaterial absorber based on a ring-grating composite structure that provides broadband absorption and high polarization sensitivity. The absorber is functionally designed with a top resonator and a bottom reflector. The underlying continuous metal layer is replaced with an anisotropic metal grating to enable polarization-sensitive reflection. The top adopts a geometrically symmetrical ring resonant structure to broaden the absorption bandwidth. The maximum absorptance under TM polarized light incidence is greater than 99.9%, and the absorptance under TE polarized light incidence is less than 3%, with a maximum extinction ratio of 56. We also demonstrate stable performance under oblique incidence. This design presents a novel approach for broadband polarization-sensitive absorbers. [ABSTRACT FROM AUTHOR]
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Database:	Engineering Source

Description
Abstract:	Improving absorption, broadening bandwidth, and enhancing polarization sensitivity are central objectives in current research. We propose a long-wave infrared metamaterial absorber based on a ring-grating composite structure that provides broadband absorption and high polarization sensitivity. The absorber is functionally designed with a top resonator and a bottom reflector. The underlying continuous metal layer is replaced with an anisotropic metal grating to enable polarization-sensitive reflection. The top adopts a geometrically symmetrical ring resonant structure to broaden the absorption bandwidth. The maximum absorptance under TM polarized light incidence is greater than 99.9%, and the absorptance under TE polarized light incidence is less than 3%, with a maximum extinction ratio of 56. We also demonstrate stable performance under oblique incidence. This design presents a novel approach for broadband polarization-sensitive absorbers. [ABSTRACT FROM AUTHOR]
ISSN:	00223727
DOI:	10.1088/1361-6463/ae7296