Super-surface focusing lens
A focusing lens and metasurface technology, applied in the directions of lenses, antennas, instruments, etc., can solve the problems of working in the same wavelength band, expanding the application range of metasurface focusing devices, and single wavelength of metasurface focusing lenses, and achieving the effect of expanding the application range.
Active Publication Date: 2019-03-08
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology
[0004] By providing a metasurface focusing lens, the present invention solves the technical problem in the prior art that the metasurface focusing lens can only work at a single wavelength or at the same wavelength band, and expands the application range of the metasurface focusing device in terms of multiple wavelengths
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[0030] The embodiment of the present invention solves the technical problem that the metasurface focusing lens in the prior art can only work at a single wavelength or the same wavelength band by providing a metasurface focusing lens, and expands the application of the metasurface focusing device in multiple wavelengths scope.
[0031] The technical solution in the embodiment of the present invention is to solve the above-mentioned problems, and the general idea is as follows:
[0032] The first antenna layer is disposed on the first face of the first dielectric layer; the first face of the transparent conductive oxide layer is disposed on the second face of the first dielectric layer; the second antenna layer is disposed inside the second dielectric layer The second dielectric layer is arranged on the second surface of the transparent conductive oxide layer; the reflectance of the transparent conductive oxide layer to the incident light of the first wave band is greater than ...
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The invention discloses a super-surface focusing lens. A first antenna layer is disposed on the first surface of a first dielectric layer; the first surface of a transparent conductive oxide layer isarranged on the second surface of the first dielectric layer; a second antenna layer is arranged inside a second dielectric layer; the second dielectric layer is arranged on the second surface of thetransparent conductive oxide layer; the reflectivity of the transparent conducting oxide layer to the incident light of a first wave band is greater than or equal to 70%, the incident light belongingto the first wave band can be reflected, and the reflection focusing function is achieved; the transmission rate of the transparent conducting oxide layer to the incident light of a second wave band is larger than or equal to 75%, the incident light belonging to the second wave band can pass through the transparent conducting oxide layer, and the transmission focusing function is achieved. According to the invention, two beams of light belonging to different wave bands can be focused in different scattering spaces, so that the problem that the super-surface focusing lens can only work at a single wavelength or work in the same wave band is solved; the application range of a super-surface focusing device in the multi-wavelength aspect is expanded.
Description
technical field [0001] The invention relates to the technical field of optical devices, in particular to a metasurface focusing lens. Background technique [0002] Metasurfaces are two-dimensional metamaterials. Due to their extraordinary light manipulation ability and advantages of on-chip integration, they have attracted extensive attention in recent years. , polarization conversion, surface plasmon excitation and so on have a wide range of applications. Among the various functions mentioned above, focusing is one of the most popular research directions. At this time, the metasurface can realize the focusing effect of the lens, because the metasurface itself is a two-dimensional ultrathin structure, so it is also called a planar metalens. Compared with the shortcomings of traditional lenses, such as large volume, difficult processing, and inability to integrate, focusing lenses based on metasurfaces have the advantages of small size, light weight, and easy integration wi...
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IPC IPC(8): G02B1/00G02B3/00H01Q15/02
CPCG02B1/002G02B3/00H01Q15/02
Inventor 黄黎蓉栾井令永红
Owner HUAZHONG UNIV OF SCI & TECH