Intermediate infrared polarization independent broadband achromatic super lens and construction method thereof

An infrared polarization and super-lens technology, which is applied to lenses, polarizing elements, optics, etc., can solve problems such as unfavorable lens focusing efficiency, increase the complexity of optical systems, and improve the quality of imaging.
CN112394429AActive Publication Date: 2021-02-23NANJING UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
NANJING UNIV
Publication Date
2021-02-23

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Abstract

The invention relates to an intermediate infrared polarization independent broadband achromatic super lens and a construction method thereof. The super lens comprises a substrate and a unit structurearranged on the substrate; the phase change of the unit structure is linearly changed along with the angular frequency of incident light; the unit structure is used for adjusting the phase of the incident light of the super lens. According to the intermediate infrared polarization independent broadband achromatic super lens and the construction method thereof of the invention,the unit structure ofwhich the phase changes linearly along with the angular frequency of the incident light is arranged on the substrate, so that hyperbolic phase distribution is obtained on the surface of the super lens, a focusing effect is achieved; the focusing performance of the super lens is not sensitive to the frequency of the incident light, so that a broadband achromatic effect is achieved.
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Description

technical field

[0001] The invention belongs to the field of artificial microstructure materials, and in particular relates to a mid-infrared polarization-independent broadband achromatic superlens and a construction method thereof. Background technique

[0002] Traditional optical components have chromatic aberration problems under broadband incident light, that is, refractive lenses have positive dispersion, and diffractive lenses have negative dispersion effects. The dispersion effect will reduce focusing efficiency and imaging quality. The traditional achromatic design has problems such as complex optical system and difficulty in obtaining broadband achromatic effect. In recent years, with the in-depth study of metasurfaces in light field regulation, metalenses designed based on the principle of metasurfaces have a high degree of freedom of regulation, ultra-thin thickness, and sub-wavelength size structures, which are convenient for integration and miniaturization. At ...

Claims

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