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Long Range Optical Self-Referencing Displacement Sensor

A displacement sensor and self-referencing technology, applied in the field of displacement sensors, can solve the problem of low transmittance of sub-wavelength small holes

Active Publication Date: 2022-06-07
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In traditional optics, the transmittance for subwavelength pinholes is very low, almost close to zero

Method used

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  • Long Range Optical Self-Referencing Displacement Sensor

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Embodiment Construction

[0027] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] like Figure 1-9 As shown, the present invention provides a long-range optical self-reference displacement sensor, including a gold film layer 1, an upper glass layer 2, a gap layer 3, a lower glass layer 4 and a silicon substrate 5 in order from top to bottom. The gold film layer 1 is used for Through the current, the gold film layer 1 is etched with double nanoholes 6, the double nanoholes 6 include two intersecting circular nanoholes, and the edges of the double nanoholes 6 are used to accompany the gold film layer 1 to pass through when the charge oscillates The current oscillation generates a magnetic dipole, which includes a ring dipole and a magnetic quadrupole, and two effect blocks 7 arranged side by side are correspondingly arranged in the gap layer 3 under the double nanoholes 6. This effect Block 7 is used to strengthen the ...

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Abstract

The invention discloses a long-range optical self-reference displacement sensor, which comprises a gold film layer, an upper glass layer, a gap layer, a lower glass layer and a silicon substrate from top to bottom, the gold film layer is used for passing current, and the gold film layer The thickness is 100nm, the gold film layer is etched with double nanoholes, the double nanoholes include two intersecting circular nanoholes, and two effect blocks arranged side by side are correspondingly arranged in the gap layer below the double nanoholes, The effect block is a gold nano block. Under the vertical irradiation of electromagnetic waves, the structure of the present invention will show a sharp decrease in reflectivity at the corresponding wavelength of the excited anapole mode. Using this mode, the displacement of the object to be measured is indirectly reflected by measuring the change in the reflection spectrum of the structure, thereby Realize the detection of displacement.

Description

technical field [0001] The invention relates to the technical field of displacement sensors, in particular to a long-range optical self-reference displacement sensor. Background technique [0002] Optical displacement sensors have a wide range of applications in nanometer measurement, biosensing, and nanotechnology, and are key tools for understanding biochemical processes. In 1976, Stryer and Haugland first proposed the use of resonance energy ( resonance energy transfer, FRET) as a spectral ruler for distance measurement in biological processes. According to quantum physics models and classical Coulomb-dipole-dipole interactions, resonances are generated by radiationless transitions, and the energy transfer efficiency depends largely on the relative distance between the magnetic dipole pairs. FRET optical displacement sensors have been used in biological and chemical systems to determine distances at the molecular scale, and to track the structure and dimensions of dyna...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/02
CPCG01B11/02
Inventor 武京治王艳红杨恒泽李孟委
Owner ZHONGBEI UNIV
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