Polarization-sensitive broadband response long-wave infrared metamaterial absorber

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...

AI Technical Summary

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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