Terahertz band metamaterial sensor based on quasi-electromagnetically induced transparency (quasi-EIT) effect
A technology that induces transparency and metamaterials, applied in the field of terahertz sensors, can solve the problems of limiting the application of terahertz sensors, insufficient detection sensitivity, and affecting the detection accuracy of sensors, and achieves increased refractive index sensitivity, high refractive index sensitivity, Highlight the effect of practical features
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[0020] The technical solutions in the embodiments of the present invention will be described clearly and in detail below with reference to the drawings in the embodiments of the present invention. The described embodiments are only some of the embodiments of the invention.
[0021] The technical scheme that the present invention solves the problems of the technologies described above is:
[0022] The terahertz wave refractive index sensor of the present invention is as figure 1 As shown, the sensor includes a dielectric layer and a metamaterial of a sub-wavelength metal array attached to the dielectric layer. The sub-wavelength metal array includes a structural unit composed of a plurality of split resonant rings, and each resonant ring unit is a circular opening as a whole A combined structure of a resonant ring and a square split resonant ring. Under the excitation of terahertz waves, the split circular resonant ring behaves as a "bright" mode with a large Q value, while t...
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