Full Stokes infrared polarization imager based on metasurface

An infrared polarization and metasurface technology, applied in polarizing components, instruments, optics, etc., can solve the problems of limited and simultaneous testing of Stokes vector parameters, etc., and achieve the effects of reducing interference, accurate and efficient device polarization testing, and reducing device size

Active Publication Date: 2020-04-03
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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Problems solved by technology

Metasurface-based polarization imaging technology has also been developed accordingly, but currently proposed polarization imaging devices that can achieve full Stokes vectors work in the visible and near-i

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  • Full Stokes infrared polarization imager based on metasurface
  • Full Stokes infrared polarization imager based on metasurface
  • Full Stokes infrared polarization imager based on metasurface

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Embodiment approach

[0031] Such as figure 1 As shown, the metasurface-based full Stokes vector mid-infrared polarization imaging device is mainly composed of a dielectric subwavelength unit structure array arranged on the substrate, which can realize x, y, 45°, 135°, left-handed and right-handed circular polarization Simultaneous focusing and control of light, and then obtain the parameter information of the Stokes vector, and realize the polarization detection of the target object. The metasurface unit structure utilized by the realization of the present invention is a hexagonal periodic structure, such as figure 2 As shown, the main control function of the structure is the rectangular silicon pillar and the elliptical silicon pillar. The working wavelength of the structure is 10.6 μm, the thickness of the silicon structure is h=10 μm, and the base material is also silicon, and the thickness is not required. In order to realize the measurement of the full Stokes vector parameters, silicon pill...

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Abstract

The invention provides a full Stokes infrared polarization imager based on a metasurface. The full Stokes infrared polarization imager based on the metasurface can achieve real-time detection and imaging of all polarized light of an infrared band by regulating and controlling the geometrical characteristics and the arrangement mode of a sub-wavelength unit structure. The polarization imager is mainly composed of an ultra-thin single-layer sub-wavelength unit structure array arranged on a substrate layer, sub-wavelength unit structures with different geometric dimensions have different electromagnetic response characteristics on x, y, 45 degrees, 135 degrees, levorotatory circularly polarized light and dextrorotatory circularly polarized light, and independent regulation and control on thesix kinds of polarized light can be achieved. The polarization imager mainly depends on a focal plane polarization imaging mode, six kinds of polarized light can be focused at different positions of the same focal plane at the same time, and when any polarized light irradiates a device, the polarization state of incident light can be calculated through a Stokes vector function. The polarization imager has important application in the field of infrared polarization imaging detection.

Description

technical field [0001] The invention belongs to the field of micro-nano optical design, and in particular relates to a metasurface-based full-Stokes infrared polarization imager. Background technique [0002] Infrared imaging detection technology has important application value in marine, space detection and biomedicine because of its good concealment, long imaging distance and anti-interference characteristics. Traditional infrared optical imaging technology mainly obtains target information by detecting thermal radiation intensity. When the background interference of the target is large or the target radiation intensity is low, pure radiation intensity information cannot accurately identify the detection target. Polarization is another important characteristic of light besides wavelength, intensity, and phase. During the interaction between light and matter, the polarization of light can reflect the surface morphology, refractive index, and structural texture of the target...

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Application Information

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IPC IPC(8): G02B1/00G02B5/30
CPCG02B1/002G02B5/30
Inventor 罗先刚蒲明博马晓亮李雄靳金金
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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