A terahertz metamaterial sensor with complementary structure

A metamaterial and sensor technology, applied in the field of terahertz sensors, can solve the problems of restricting the application of terahertz sensors, affecting the detection accuracy of sensors, and the detection sensitivity is not high enough, so as to increase the sensitivity of the refractive index, highlight the practical features, and improve the transmission efficiency. The effect of sense of precision

Active Publication Date: 2021-05-18
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0005] At present, the detection sensitivity of terahertz metamaterial refractive index sensors at home and abroad is not high enough for some trace substances or substances with small concentrations, which limits the application of terahertz sensors.
Moreover, the spectral resolution of the terahertz time-domain spectroscopy system currently used for experimental measurement is low, which affects the accuracy of sensing detection

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  • A terahertz metamaterial sensor with complementary structure
  • A terahertz metamaterial sensor with complementary structure
  • A terahertz metamaterial sensor with complementary structure

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Embodiment Construction

[0023] 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.

[0024] The technical scheme that the present invention solves the problems of the technologies described above is:

[0025] 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 hollowed-out air strip structural units, and each of the resonant ring units is a vertical air strip as a whole. Combination structure of bar and two horizontal air bars. The vertical air strip is located at the center of the structural unit, and the two horizontal air strips are located on both sides of the vertical air strip, t...

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Abstract

The invention provides a complementary terahertz band metamaterial sensor. The sensor includes a medium layer and a metamaterial of a subwavelength metal array attached to the medium layer. The subwavelength metal array includes a hollowed-out vertical air strip and two horizontal air strips, forming a complementary structure with the metal layer. Each of the vertical air strips is placed in the center of the structural unit, and the two horizontal air strips are respectively located on both sides of the vertical air strips, and the right air strip has a downward 40-45 μm relative to the left horizontal air strip. panning. Through the translation of the horizontal air bar on the right, the symmetry of the structure is broken and an EIT-like effect is realized. And due to the realization of the complementary structure, the Q value and sensing performance of the device are greatly improved. Highly sensitive refractive index sensing in the frequency range of 400GHz‑900GHz is realized.

Description

technical field [0001] The invention belongs to a terahertz sensor technology, in particular to a metamaterial refractive index sensor with a complementary structure. Background technique [0002] Terahertz (THz) radiation usually refers to electromagnetic radiation with a frequency between microwave and infrared bands. It is a special area on the electromagnetic spectrum transitioning from electronics to photonics, and its frequency ranges from 0.1 to 10 THz. At present, with the development of terahertz radiation generation and detection technology, THz has great potential in non-ionizing biochemical sensing applications. Metamaterials usually refer to artificial composite structures or composite materials with strange electromagnetic properties that natural media do not have in nature. They have peculiar electromagnetic resonance properties, such as negative refraction, abnormal transmission, and sensitivity to dielectric environments. It does not mainly depend on the in...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/41
CPCG01N21/41
Inventor 潘武闫彦君沈大俊
Owner CHONGQING UNIV OF POSTS & TELECOMM
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