Surface plasmon enhanced acoustic wave sensor based on Kerr effect

A surface plasmon, acoustic wave sensor technology, applied in the measurement of ultrasonic/sonic/infrasonic waves, instruments, measuring devices, etc., can solve the problem of low sensitivity of the acoustic wave detection method, and achieve good application prospects, easy to use, and high-sensitivity detection. Effect

Inactive Publication Date: 2020-11-24
中山科立特光电科技有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

Conventional sonic detec...

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  • Surface plasmon enhanced acoustic wave sensor based on Kerr effect
  • Surface plasmon enhanced acoustic wave sensor based on Kerr effect

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Embodiment 1

[0020] The invention provides a surface plasmon enhanced acoustic wave sensor based on the Kerr effect. Such as figure 1 As shown, the surface plasmon-enhanced acoustic wave sensor based on the Kerr effect includes a substrate 1 , a piezoelectric material layer 2 , grooves 3 , and noble metal particles 4 . The piezoelectric material layer 2 is placed on the substrate 1 . The material of the base 1 is non-magnetic material. Preferably, the material of the substrate 1 is silicon dioxide. The piezomagnetic material layer 2 can be a metal piezomagnetic material, a ferrite piezomagnetic material, or a rare earth piezomagnetic material. Preferably, the piezomagnetic material layer 2 is a metallic piezomagnetic material, because the metallic piezomagnetic material has high saturation magnetization and excellent mechanical properties, and is convenient for use under high power. The metal piezomagnetic material can be Fe-Co-V system, Fe-Ni system, Fe-Al system, Ni-Co system alloy. ...

Embodiment 2

[0027] On the basis of Example 1, such as figure 2 As shown, the groove 3 is provided with liquid, and the noble metal particles 4 are arranged in the liquid. Arranging liquid in the groove 3 is beneficial to confine the sound wave in the groove 3, enhance the absorption of the sound wave by the piezoelectric material layer 2, enhance the Kerr effect, and improve the sensitivity of sound wave detection. The liquid may be one liquid, or a mixture of several liquids. Preferably, the liquid is transparent in the incident light wavelength range. For example, the wavelength range of the incident light is in the visible light band, and the liquid is water. In this way, the liquid absorbs less incident light, and the incident light can excite stronger surface plasmon resonance on the noble metal particles 4 .

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Abstract

The invention provides a surface plasmon enhanced acoustic wave sensor based on a Kerr effect, which comprises a substrate, a piezomagnetic material layer, grooves and noble metal particles, the piezomagnetic material layer is arranged on the substrate, the grooves are periodically arranged on the surface of the piezomagnetic material layer, and the noble metal particles are arranged in the grooves. During application, linearly polarized light obliquely irradiates the piezomagnetic material layer, an external magnetic field is applied in the direction perpendicular to the incident plane, and sound wave detection is achieved by detecting the intensity of reflected light. The method has the advantages of being high in sensitivity and convenient to use.

Description

technical field [0001] The invention relates to the field of acoustic wave sensing, in particular to a surface plasmon enhanced acoustic wave sensor based on the Kerr effect. Background technique [0002] Acoustic detection is very important in engineering technology. Commonly used acoustic wave detection methods include transmission method, refraction method and reflection method. Conventional acoustic detection methods have low sensitivity. Contents of the invention [0003] In order to solve the above problems, the present invention provides a surface plasmon-enhanced acoustic wave sensor based on the Kerr effect, including: a substrate, a piezoelectric material layer, grooves, noble metal particles, and the piezoelectric material layer is placed on the substrate. Grooves are periodically arranged on the surface of the piezoelectric material layer, and noble metal particles are arranged in the grooves; when applied, the linearly polarized light irradiates the piezoele...

Claims

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Application Information

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IPC IPC(8): G01H11/02
CPCG01H11/02
Inventor 不公告发明人
Owner 中山科立特光电科技有限公司
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