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Optical fiber photoacoustic microscope based on surface plasmon phase sensing

A photoacoustic microscope and surface plasmon technology, applied in the field of microscopes, can solve the problems of not meeting the requirements of miniaturization, narrow detection bandwidth, low detection sensitivity, etc., and achieve the improvement of boost detection sensitivity, large detection bandwidth, and small size. Effect

Pending Publication Date: 2020-04-17
SHENZHEN UNIV
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Problems solved by technology

[0003] The embodiment of the present application provides a fiber optic photoacoustic microscope based on surface plasmon phase sensing, which aims to solve the problems of low detection sensitivity and narrow detection bandwidth in the existing photoacoustic microscope, and does not meet the needs of miniaturization. demand problem

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  • Optical fiber photoacoustic microscope based on surface plasmon phase sensing
  • Optical fiber photoacoustic microscope based on surface plasmon phase sensing
  • Optical fiber photoacoustic microscope based on surface plasmon phase sensing

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Embodiment Construction

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0045]It should be understood that when used in this specification and the appended claims, the terms "comprising" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude one or Presence or addition of multiple other features, integers, steps, operations, elements, components and / or collections thereof.

[0046] The following descriptions of the various embodiments refer to the accompanying d...

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Abstract

The invention relates to an optical fiber photoacoustic microscope based on surface plasmon phase sensing, which generates pulse excitation light to irradiate a sample so as to generate ultrasonic pressure waves and change the refractive index of a deionized water film in a plasmon phase sensor, so that the phase of detection light entering the plasmon phase sensor is changed. Polarized light is generated, and the first polarized light is input into the photoacoustic wave detection assembly through the beam splitter to eliminate background noise; one path of light beam in the second polarizedlight serves as detection light to be emitted into the plasmon phase sensor, a reflected light beam corresponding to the detection light serves as interference detection light, the other path of lightbeam serves as interference reference light through mirror reflection, coherent light is obtained after the two beams of light are coherent through the optical fiber interference assembly, and ultrasonic pressure wave information of the sample can be obtained through the coherent light intensity. By utilizing the resonance effect of the plasmon phase sensor, the acoustic pressure detection sensitivity is greatly improved, the ultra-large detection bandwidth is kept, the optical fiber is used for transmitting light beams, and the characteristics of good stability and miniaturization are achieved.

Description

technical field [0001] The invention relates to the technical field of microscopes, in particular to a fiber optic photoacoustic microscope based on surface plasmon phase sensing. Background technique [0002] High-resolution microscopes are widely used in many scientific fields such as physics, chemistry, and biology. Due to their low resolution, traditional optical microscopes cannot meet the needs of use when high-resolution images are required, and traditional optical microscopes can only display samples. The image of the surface cannot be obtained for the image of the deep layer of the sample. The photoacoustic microscope in the prior art can obtain images of the deep layer of the sample, but the existing photoacoustic microscope generally uses piezoelectric ultrasonic transducers, and the photoacoustic microscope manufactured by using this equipment has a narrow detection bandwidth ( 50MHz), detection sensitivity (about 1kPa) is not high, in addition, the existing pho...

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Application Information

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IPC IPC(8): G01N21/21
CPCG01N21/1702G01N21/21
Inventor 宋伟董玉枢闵长俊袁小聪
Owner SHENZHEN UNIV
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