Terahertz wave filter
A filter and terahertz technology, which is applied in the field of terahertz wave filters, can solve problems such as the inability to realize the tuning of the transmission frequency and the inability to realize the control work
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[0027] figure 1 It is a structural schematic diagram of the terahertz wave filter involved in the present invention in an embodiment.
[0028] like figure 1 As shown, the terahertz wave filter 10 has a base layer 1 , a sub-wavelength metal grating layer 2 , and a temperature control device (not shown in the figure), and the sub-wavelength metal grating layer 2 includes metal grid bars 3 and dielectric grid bars 4 .
[0029] The metal grid strips 3 are made of copper, and the dielectric grid strips 4 are made of air. The metal grid strips 3 and the dielectric grid strips 4 are alternately arranged periodically. The subwavelength metal grating layer 2 has a grating period of 20 μm, a duty ratio of 4:1, and a grating groove depth of 500 nm. The frequency range of the incident terahertz wave is 0.3-3 THz, and the corresponding wavelength range is 100 μm to 1000 μm, and the grating period of the sub-wavelength metal grating layer is smaller than the wavelength of the incident wa...
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