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Bloch surface wave exciter, nano-particle spectrometer and measuring method of nano-particle spectrometer

A nanoparticle and measurement method technology, applied in the field of spectroscopy, can solve the problems of complex preparation method, easy oxidation life, unfavorable integration, etc., and achieve the effect of simple preparation method, simple requirements, and favorable integration.

Pending Publication Date: 2021-09-21
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The components excited by the grating scattering method for BSW have high scattering efficiency, but the size is large, which is not conducive to integration
The element using asymmetric slit scattering method to excite BSW can be used as a one-way coupler, but its structure design is complex and its size is relatively large
The cost of using the silver nanowire scattering method to excite BSW is low, but it is easy to oxidize, resulting in short life, poor stability, and also has the problem of large size.
At the same time, when the above three components excite the BSW, they all have certain requirements on the incident light, and the preparation methods of these three devices are relatively complicated, cannot be produced in batches, and the cost is high

Method used

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Embodiment Construction

[0025] Below in conjunction with the drawings, preferred embodiments of the present invention are given and described in detail.

[0026] Such as figure 2 As shown, the Bloch surface wave modulated nanoparticle spectrometer according to the present invention sequentially includes an incident objective lens 1, a dispersion element 2, a collecting objective lens 3, a collecting lens 4 and an imaging camera 5 along the direction of the spectral signal to be measured. The spectrum is irradiated to the incident objective lens 1 and converged into the dispersive element 2, which excites the dispersive element 2 to generate BSW. The leaked light field is collected by the collecting objective lens 3, focused by the collecting lens 4 and transmitted to the imaging camera 5.

[0027] Among them, the dispersive element 2 is a nanoparticle-based Bloch surface wave exciter (that is, an optical chip that excites BSW), such as image 3 and Figure 4 As shown, the dispersion element 2 incl...

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Abstract

The invention relates to a Bloch surface wave exciter based on nano-particles, used for a spectrograph. The Bloch surface wave exciter comprises a glass substrate and a Bragg reflection unit arranged on the glass substrate, the Bragg reflection unit is formed by alternately stacking high-refractive-index dielectric layers and low-refractive-index dielectric layers, the top layer of the Bragg reflection unit is a defect layer, and nanoparticles are arranged on the surface of the top layer. The invention also provides a corresponding spectrometer and a measuring method thereof. According to the Bloch surface wave exciter, the in-plane size of a spectrograph can reach the nanoscale, and small light source signals can be measured. In addition, the preparation method is simple and low in cost. In addition, when the spectrometer is used, the requirement for the incident spectrum is simple, and the requirement for polarization of the incident spectrum does not exist. Meanwhile, the back focal plane image only needs to be shot once, so that the operation is simple, and the time is saved.

Description

technical field [0001] The invention relates to the technical field of spectroscopy, in particular to a Bloch surface wave exciter, a Bloch surface wave modulated nanoparticle spectrometer and a measurement method thereof. Background technique [0002] Spectroscopy is one of the most widely used techniques in industrial process and basic science research, with applications in water quality monitoring, soil science, mineral detection, hyperspectral imaging, and medical vaccine research, among others. A spectrometer is a device used for spectral detection. In the process of use, the spectrometer is required to have the advantages of ultra-compact, low cost and time saving. Traditional grating spectrometers such as figure 1 As shown, this kind of spectrometer has limitations on photon efficiency, resolution and spectral range, and the size of its internal optical components is large, which limits the reduction of the size of the spectrometer. Therefore, there is a need to dev...

Claims

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Application Information

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IPC IPC(8): G01J3/02G01J3/28G02B5/00G02B5/08
CPCG01J3/0205G01J3/28G02B5/008G02B5/0816
Inventor 王茹雪武爱民
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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