Focal length-adjustable terahertz metasurface lens and preparation method and application thereof
A terahertz and lens technology, applied in the field of terahertz metal lens and its preparation, can solve the problems of single function and application of terahertz lens, and achieve the effect of high modulation efficiency
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[0052] The present invention will be further described in detail below in conjunction with the examples.
[0053] The focus-tunable terahertz metalens of this embodiment integrates liquid crystals and metasurfaces, and the cross-section of the lens is as follows figure 1 As shown, it includes a substrate 6, a dielectric layer 1, a first electrode layer 2, a second electrode layer 5, a first alignment layer 3, a second alignment layer 4, and a liquid crystal layer 7 that are oppositely arranged; wherein, the dielectric layer 1 is far away from the substrate One side of 6 is provided with medium superstructure surface layer 8, namely figure 1 The upper surface of the dielectric layer 1 shown in ; the side of the dielectric layer 1 facing the substrate 6 is provided with the first electrode layer 2 and the first alignment layer 3 in sequence, the substrate 6 is located below the dielectric layer 1, and the substrate 6 faces the dielectric layer 1 is provided with a second electr...
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