Liquid crystal based broadband negative refractive index device with adjustable temperature and production method thereof
A technology of negative refractive index and production method, which is applied in instruments, polarizing elements, optics, etc., can solve the problems of inability to meet the application requirements of negative refractive index materials, and achieve the effect of greatly dynamically adjustable operating frequency.
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Embodiment 1
[0047] Embodiment 1: use circuit board printing technology to etch the metal sheet 5 array of fishnet structure on one side of the copper clad laminate 1 with a thickness of 1.00mm, the size of the metal sheet 5 is: W=8.00mm, L=12.00mm, Px= 15.00mm, Py=10.00mm. Positioning holes 4 with a diameter of 1.00 mm are machined at the four corners of the copper clad laminate 1 . An epoxy glass plate with a thickness of 0.50 mm and the same size as the copper clad laminate 1 is selected, and a U-shaped bead 2 with a side width of 5.00 mm and a positioning hole 4 is prepared by using a numerical control machine tool. A polyimide liquid crystal aligning agent is coated on the side of the copper clad plate 1 with a metal sheet array by the spin coating method, and a film is formed by thermal curing by a stepwise heating method, and the polyimide film is oriented and rubbed with a dust-free cloth to obtain A polyimide liquid crystal alignment layer that aligns liquid crystal molecules ver...
Embodiment 2
[0051] Example 2: An array of metal sheets 5 with a fishnet structure is prepared on a copper-clad laminate 1 with a thickness of 1.00 mm by circuit board printing technology. The size of the metal sheets is: W=6.00 mm, L=10.00 mm, Px=15.00 mm, Py = 8.00 mm. At the same time, positioning holes 4 with a diameter of 1.00 mm are machined at the four corners of the copper clad laminate 1 . Select an epoxy glass plate with a thickness of 0.40 mm and the same size as the copper-clad laminate 1, and use a CNC machine tool to prepare a U-shaped bead 2 with a side width of 5.00 mm, and machine the four corners of the U-shaped bead 2 into a positioning plate with a diameter of 1.00 mm. hole. A polyimide liquid crystal aligning agent is coated on the side of the copper clad plate 1 with a metal sheet array by the spin coating method, and a film is formed by thermal curing by a stepwise heating method, and the polyimide film is oriented and rubbed with a dust-free cloth to obtain A poly...
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