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Polarization-sensitive broadband response long-wave infrared metamaterial absorber

A polarization-sensitive, long-wave infrared technology, used in instruments, optics, diffraction gratings, etc., can solve the problems of complex structure of polarization detection system, low response efficiency, difficult processing technology, etc., achieve high broadband absorption efficiency, improve imaging quality, Good polarization effect

Active Publication Date: 2021-08-06
NORTHEAST NORMAL UNIVERSITY
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of complex structure, low response efficiency and difficult processing technology of the existing polarization detection system. The present invention provides a polarization-sensitive broadband response long-wave infrared metamaterial absorber

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  • Polarization-sensitive broadband response long-wave infrared metamaterial absorber

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Embodiment Construction

[0029] In order to more clearly illustrate the purpose, significance, features and advantages of the above-mentioned present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

[0031] The polarization-sensitive broadband-responsive long-wave infrared metamaterial absorber is characterized in that it includes: a broadband-absorbing metal periodic array structure 3, an intermediate dielectric layer 2, and a polarization-responsive metal periodic array structure 1;

[0032] Electromagnetic radiation is incident from the broa...

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Abstract

The invention discloses a polarization-sensitive broadband response long-wave infrared metamaterial absorber. The absorber comprises a broadband absorption metal periodic array structure, an intermediate dielectric layer and a polarization response metal periodic array structure. Electromagnetic radiation enters from the broadband absorption metal periodic array structure, thickness of the polarization response metal periodic array structure is larger than the attachment depth of a metal material of the polarization response metal periodic array structure in a target wave band, and TE polarization sensitive response is shown; or electromagnetic radiation enters from the polarization response metal periodic array structure and shows TM polarization sensitive response; and ultra-wideband polarization absorption response can be realized in a long-wave infrared range. Due to the fact that the polarization effect is good, broadband absorption efficiency is high, and the structure is simple, a new design thought is developed for designing the broadband polarization sensitive absorber. When the system is combined with an area array polarization detection system, infrared polarization detection can be realized without using optical elements such as a polaroid, aberration caused by the alignment problem between the polaroid and an imaging unit is avoided, an optical system is simplified, and the imaging quality is improved.

Description

technical field [0001] The invention relates to the technical field of a broadband response polarization-sensitive metamaterial absorber and infrared detection, in particular to a polarization-sensitive broadband response long-wave infrared metamaterial absorber. Background technique [0002] Polarization-sensitive absorbers can collect not only intensity and phase information but also polarization information. Polarization imaging using polarization information to achieve detection is a new detection technology that combines polarization measurement with image processing. By measuring the polarization degree and polarization angle information of target radiation and reflection, useful information can be distinguished in complex natural backgrounds. . Compared with traditional intensity images and infrared thermal images, infrared polarization imaging can not only effectively identify low-contrast targets that cannot be or are difficult to distinguish by traditional intensi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/00G02B1/00G02B5/18
CPCG02B5/003G02B1/002G02B5/18
Inventor 梁中翥于海洪徐海阳孟德佳侯恩柱刘华刘益春
Owner NORTHEAST NORMAL UNIVERSITY
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