CN108152267A - A kind of method of efficient excitation metallized optical fibre Surface enhanced Raman scattering - Google Patents

A kind of method of efficient excitation metallized optical fibre Surface enhanced Raman scattering Download PDF

Info

Publication number
CN108152267A
CN108152267A CN201810092571.0A CN201810092571A CN108152267A CN 108152267 A CN108152267 A CN 108152267A CN 201810092571 A CN201810092571 A CN 201810092571A CN 108152267 A CN108152267 A CN 108152267A
Authority
CN
China
Prior art keywords
optical fiber
metallized
fiber
light
optical fibre
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201810092571.0A
Other languages
Chinese (zh)
Other versions
CN108152267B (en
Inventor
梅霆
刘旻
卢凡凡
张文定
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Northwestern Polytechnical University
Original Assignee
Northwestern Polytechnical University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Northwestern Polytechnical University filed Critical Northwestern Polytechnical University
Priority to CN201810092571.0A priority Critical patent/CN108152267B/en
Publication of CN108152267A publication Critical patent/CN108152267A/en
Application granted granted Critical
Publication of CN108152267B publication Critical patent/CN108152267B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/62Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/65Raman scattering
    • G01N21/658Raman scattering enhancement Raman, e.g. surface plasmons

Landscapes

  • Health & Medical Sciences (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)

Abstract

本发明涉及一种高效激发金属化光纤表面增强拉曼散射的方法,利用柱状矢量光场,作为激发光,从光纤内部诱导金属化光纤表面增强拉曼散射(SERS)效应。利用高SERS活性金属化锥形光纤作为探针,相比线偏振光激发,柱状矢量光场可以显著增强电磁场从而提高SERS探测灵敏度。柱状矢量光场从光纤内部传输至探针末端,在柱状矢量光场和表面等离激元满足波矢匹配的情况下,在镀金属膜光纤针尖的末端实现局域表面等离激元共振,进而提高激发拉曼信号的强度,其中柱状矢量光场利用电控可调谐声致光栅在光纤中直接产生。本发明操作简单,拉曼增强效果显著,同时装置简单易集成,可用于固体粉末、液体、气体三种体系的拉曼信号检测。

The invention relates to a method for efficiently exciting metallized optical fiber surface-enhanced Raman scattering, using a columnar vector light field as excitation light to induce metallized optical fiber surface-enhanced Raman scattering (SERS) effect from the inside of the optical fiber. Using a metallized tapered optical fiber with high SERS activity as a probe, compared with linearly polarized light excitation, the columnar vector light field can significantly enhance the electromagnetic field and thus improve the SERS detection sensitivity. The columnar vector light field is transmitted from the inside of the fiber to the end of the probe. When the columnar vector light field and the surface plasmons meet the wave vector matching, localized surface plasmon resonance is realized at the end of the metal-coated fiber tip. Then the intensity of the excited Raman signal is increased, wherein the columnar vector light field is directly generated in the optical fiber by using an electrically controlled tunable acoustic grating. The invention has the advantages of simple operation, remarkable Raman enhancement effect, simple device and easy integration, and can be used for Raman signal detection of three systems of solid powder, liquid and gas.

Description

一种高效激发金属化光纤表面增强拉曼散射的方法A method for efficiently exciting surface-enhanced Raman scattering of metallized optical fibers

技术领域technical field

本发明属于表面增强拉曼,领域涉及一种高效激发金属化光纤表面增强拉曼散射的方法。The invention belongs to surface-enhanced Raman, and the field relates to a method for efficiently exciting metallized optical fiber surface-enhanced Raman scattering.

背景技术Background technique

表面增强拉曼光谱术(SERS),因其能显著增强材料本征拉曼信号的特性,成为分析检测分子的重要工具,被广泛应用于化学、生物、食品安全等众多领域。表面增强拉曼通常通过局域表面等离共振(LSPR)来实现。局域表面等离共振(LSPR)可以在亚波长尺度内产生显著的电场增强效应,增强光与物质的相互作用,从而实现拉曼信号的增强。许多纳米贵金属结构用来产生LSPR效应,包括纳米球、金属化光纤探针、纳米棒及纳米光栅等。其中,金属化光纤具有优良的抗干扰和低噪声的特性,易集成,能在提高探测灵敏度的同时,使光学激发和收集系统得到简化。Surface-enhanced Raman spectroscopy (SERS) has become an important tool for analyzing and detecting molecules because of its ability to significantly enhance the intrinsic Raman signal of materials, and has been widely used in many fields such as chemistry, biology, and food safety. Surface-enhanced Raman is usually achieved by localized surface plasmon resonance (LSPR). Localized surface plasmon resonance (LSPR) can generate a significant electric field enhancement effect in the subwavelength scale, enhance the interaction between light and matter, and thus realize the enhancement of Raman signal. Many nanoscale noble metal structures are used to produce the LSPR effect, including nanospheres, metallized fiber probes, nanorods, and nanogratings. Among them, the metallized optical fiber has excellent anti-interference and low noise characteristics, and is easy to integrate. It can simplify the optical excitation and collection system while improving the detection sensitivity.

SERS性能与激发光偏振态、基底、系统信号收集方式等众多因素有关,其中激发光偏振态是关键因素之一。径向偏振矢量光和角向偏振矢量光,两种典型的柱状矢量光,因其特殊的偏振特性被广泛关注。径向偏振矢量光在紧聚焦的情况下能在焦点处产生极强的纵向电场分量,在超分辨成像、粒子捕获、拉曼散射增强方面有众多应用。考虑到表面增强拉曼主要由纳米结构的局域表面等离激元共振(LSPR)所致,以及角向矢量光与径向矢量光横截面偏振分布的对称性、特殊性和相似性,另外,金属化光纤具有抗干扰、低噪声、易集成的特性,所以径向偏振矢量光和角向矢量光用于内部激发金属化光纤拉曼散射在提高SERS探测灵敏度上具有很大潜力。寻找适用于光纤中矢量光产生和传输的方式,以及优化金属化光纤的几何结构和表面形貌以匹配矢量光模式获得最佳激发效率成为必要。The SERS performance is related to many factors such as the polarization state of the excitation light, the substrate, and the system signal collection method, among which the polarization state of the excitation light is one of the key factors. Radially polarized vector light and angularly polarized vector light, two typical columnar vector lights, have been widely concerned because of their special polarization characteristics. Radially polarized vector light can generate extremely strong longitudinal electric field components at the focal point under tight focusing, and has many applications in super-resolution imaging, particle trapping, and Raman scattering enhancement. Considering that the surface-enhanced Raman is mainly caused by the localized surface plasmon resonance (LSPR) of the nanostructure, and the symmetry, specificity and similarity of the cross-sectional polarization distribution of the angular vector light and the radial vector light, in addition , the metallized optical fiber has the characteristics of anti-interference, low noise, and easy integration, so the radial polarization vector light and angular vector light used to excite the Raman scattering of the metallized optical fiber inside have great potential in improving the detection sensitivity of SERS. It is necessary to find a method suitable for the generation and transmission of vector light in optical fibers, and to optimize the geometric structure and surface morphology of metallized optical fibers to match the vector light mode to obtain the best excitation efficiency.

发明内容Contents of the invention

要解决的技术问题technical problem to be solved

为了避免现有技术的不足之处,本发明提出一种高效激发金属化光纤表面增强拉曼散射的方法。In order to avoid the disadvantages of the prior art, the present invention proposes a method for efficiently exciting metallized optical fiber surface-enhanced Raman scattering.

技术方案Technical solutions

一种高效激发金属化光纤表面增强拉曼散射的方法,其特征在于步骤如下:A method for efficiently exciting metallized optical fiber surface enhanced Raman scattering, characterized in that the steps are as follows:

步骤1、利用可调谐声致光栅法在光纤中直接产生柱状矢量光:将光纤5置于前物镜4的光路上,前物镜4的入射光路上依次设有线偏振光源1、带通滤波片2和半波片3;滤模器6设于光纤5位于前物镜4一端,超声波发生器8的输出端加载于光纤5中部,其输入端连接射频发生器7;Step 1. Use the tunable acoustic grating method to directly generate columnar vector light in the optical fiber: place the optical fiber 5 on the optical path of the front objective lens 4, and the incident optical path of the front objective lens 4 is sequentially provided with a linearly polarized light source 1 and a bandpass filter 2 And half-wave plate 3; Mode filter 6 is located at optical fiber 5 and is positioned at front objective lens 4 one ends, and the output end of ultrasonic generator 8 is loaded in the middle part of optical fiber 5, and its input end connects radio frequency generator 7;

启动线偏振光源1和射频发生器7,超声波发生器产生的超声波耦合到光纤中传输,在光纤中形成线偏振光栅进行调制,通过旋转半波片3以调节光源出射光的偏振方向,同时调节射频发生器7的频率直至满足模式匹配,从而将纤芯中的矢量基模转换为柱状矢量光场;Start the linearly polarized light source 1 and the radio frequency generator 7, and the ultrasonic wave generated by the ultrasonic generator is coupled to the optical fiber for transmission, and a linear polarization grating is formed in the optical fiber for modulation, and the polarization direction of the light emitted by the light source is adjusted by rotating the half-wave plate 3. The frequency of the radio frequency generator 7 is until the mode matching is satisfied, thereby converting the vector fundamental mode in the fiber core into a columnar vector light field;

步骤2、利用火焰拉锥法和光诱导化学沉积法制备金属化光纤探针:采用火焰拉锥法在光纤5的一端制备光纤锥,再采用光诱导无电沉积法在锥形光纤表面镀贵金属,得到光纤5的一端的金属化光纤探针9;Step 2, using the flame tapering method and light-induced chemical deposition method to prepare metallized optical fiber probes: using the flame tapering method to prepare an optical fiber taper at one end of the optical fiber 5, and then using the light-induced electroless deposition method to plate noble metal on the surface of the tapered optical fiber, Obtain the metallized optical fiber probe 9 at one end of the optical fiber 5;

步骤3、利用光纤中柱状矢量光激发金属化光纤表面增强拉曼光谱:将金属化光纤探针9竖直浸入含有被测物质的液体中,或将含有被测物质的液体或者固体粉末涂敷在金属化光纤探针9表面,将具有金属化光纤探针9的光纤5置于步骤1所述光路的前物镜4光路上,金属化光纤探针9前端设有后物镜10,后物镜10的射出光路上依次设有长波通带边滤波片11、光纤适配器12和拉曼光谱仪13;Step 3. Use the columnar vector light in the optical fiber to excite the surface-enhanced Raman spectrum of the metallized optical fiber: vertically immerse the metallized optical fiber probe 9 in the liquid containing the substance to be measured, or coat the liquid or solid powder containing the substance to be measured On the metallized fiber probe 9 surface, the optical fiber 5 with the metallized fiber probe 9 is placed on the optical path of the front objective lens 4 of the optical path described in step 1, the front end of the metallized fiber probe 9 is provided with a rear objective lens 10, and the rear objective lens 10 A long-wave pass band-edge filter 11, an optical fiber adapter 12 and a Raman spectrometer 13 are arranged in sequence on the exit optical path;

启动线偏振光源1和射频发生器7,超声波发生器产生的超声波耦合到光纤中传输,在光纤中形成线偏振光栅进行调制,通过旋转半波片3以调节光源出射光的偏振方向,同时调节射频发生器7的频率直至满足模式匹配,从而将纤芯中的矢量基模转换为柱状矢量光场;金属化光纤探针9的出射信号通过后物镜10准直之后,被长波通带边滤波片11滤除激发光,产生的拉曼信号经光纤适配器12收集,被拉曼光谱仪13处理。Start the linearly polarized light source 1 and the radio frequency generator 7, and the ultrasonic wave generated by the ultrasonic generator is coupled to the optical fiber for transmission, and a linear polarization grating is formed in the optical fiber for modulation, and the polarization direction of the light emitted by the light source is adjusted by rotating the half-wave plate 3. The frequency of the radio frequency generator 7 is until the mode matching is satisfied, thereby converting the vector fundamental mode in the fiber core into a columnar vector light field; the outgoing signal of the metallized fiber optic probe 9 is collimated by the rear objective lens 10, and is filtered by the long-wave pass band edge The chip 11 filters the excitation light, and the generated Raman signal is collected by the fiber optic adapter 12 and processed by the Raman spectrometer 13 .

所述光纤锥的锥角为30度。The taper angle of the fiber taper is 30 degrees.

所述光诱导无电沉积法在锥形光纤表面金属化的方法是:以功率小于1mW的线偏振光作为诱导光,将火焰拉锥法制备的光纤锥竖直浸入产生贵金属的化学反应液中,通光镀5-60min。The method for metallizing the surface of the tapered optical fiber by the light-induced electroless deposition method is: using linearly polarized light with a power less than 1mW as the inductive light, vertically immersing the optical fiber taper prepared by the flame tapering method into the chemical reaction solution that produces noble metal , light plating 5-60min.

所述贵金属为金,银或铜。The precious metal is gold, silver or copper.

所述镀贵金属的贵金属层表面纳米颗粒大小不超过激发光波长大小。The size of the nanoparticles on the surface of the noble metal layer coated with the noble metal does not exceed the size of the excitation light wavelength.

有益效果Beneficial effect

本发明提出的一种高效激发金属化光纤表面增强拉曼散射的方法,利用柱状矢量光场,作为激发光,从光纤内部诱导金属化光纤表面增强拉曼散射(SERS)效应。利用高SERS活性金属化锥形光纤作为探针,相比线偏振光激发,柱状矢量光场可以显著增强电磁场从而提高SERS探测灵敏度。柱状矢量光场从光纤内部传输至探针末端,在柱状矢量光场和表面等离激元满足波矢匹配的情况下,在镀金属膜光纤针尖的末端实现局域表面等离激元共振,进而提高激发拉曼信号的强度,其中柱状矢量光场利用电控可调谐声致光栅在光纤中直接产生。本发明操作简单,拉曼增强效果显著,同时装置简单易集成,可用于固体粉末、液体、气体三种体系的拉曼信号检测。A method for efficiently exciting metallized optical fiber surface-enhanced Raman scattering proposed by the present invention uses a columnar vector light field as excitation light to induce the metallized optical fiber surface-enhanced Raman scattering (SERS) effect from the inside of the optical fiber. Using metallized tapered fiber with high SERS activity as a probe, compared with linearly polarized light excitation, the columnar vector light field can significantly enhance the electromagnetic field and thus improve the SERS detection sensitivity. The columnar vector light field is transmitted from the inside of the fiber to the end of the probe. When the columnar vector light field and the surface plasmons meet the wave vector matching, localized surface plasmon resonance is realized at the end of the metal-coated fiber tip. Then the intensity of the excited Raman signal is increased, wherein the columnar vector light field is directly generated in the optical fiber by using an electrically controlled tunable acoustic grating. The invention has simple operation, remarkable Raman enhancement effect, simple device and easy integration, and can be used for Raman signal detection of three systems of solid powder, liquid and gas.

附图说明Description of drawings

图1:利用光纤中柱状径向矢量光激发金属化光纤表面拉曼光谱的光路系统Figure 1: Optical path system for exciting Raman spectroscopy on metallized optical fiber surface using cylindrical radial vector light in optical fiber

图2:采用火焰拉锥法制备的光纤锥Figure 2: Optical fiber cones prepared by the flame tapering method

图3:实施例镀银锥形光纤探针得到的银层表面Fig. 3: the silver layer surface that embodiment silver-plates tapered optical fiber probe obtains

具体实施方式Detailed ways

现结合实施例、附图对本发明作进一步描述:Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

本发明旨在提供一种利用光纤中柱状矢量光高效激发金属化光纤表面拉曼散射的方法,构思如下:The present invention aims to provide a method for efficiently exciting Raman scattering on the surface of a metallized optical fiber by using cylindrical vector light in an optical fiber. The concept is as follows:

利用柱状矢量光作为激发光,从光纤内部激发金属化光纤表面SERS效应,可以获得比线偏振光激发更显著的拉曼增强效应。利用金属化锥形光纤作为探针,柱状矢量光传输至探针末端,激发金属介质界面的局域表面等离共振和表面等离极化激元,进而增强光与物质的相互作用,实现拉曼散射增强。Using columnar vector light as the excitation light to excite the SERS effect on the surface of the metallized optical fiber from the inside of the optical fiber, a more significant Raman enhancement effect can be obtained than that excited by linearly polarized light. Using the metallized tapered optical fiber as the probe, the columnar vector light is transmitted to the end of the probe, which excites the local surface plasmon resonance and surface plasmon polaritons at the metal-medium interface, thereby enhancing the interaction between light and matter, and achieving pull Mann scattering enhancement.

据此构思,本发明采取如下技术方案:According to this idea, the present invention takes following technical scheme:

利用可调谐声致光栅法在光纤中直接产生柱状矢量光,通过调节入射光场的偏振方向和电控可调谐光栅的折射率调制度来实现相位匹配,以在光纤中产生柱状矢量光场。The columnar vector light is directly generated in the fiber by using the tunable acoustic grating method, and the phase matching is realized by adjusting the polarization direction of the incident light field and the refractive index modulation degree of the electrically controlled tunable grating to generate the columnar vector light field in the fiber.

利用高SERS活性金属化锥形光纤作为探针。金属化锥形光纤探针的制备先拉锥,再镀贵金属层。光纤成锥采用热拉锥法法或化学法;光纤的金属化过程采用光诱导无电沉积法,通过优化光诱导无电沉积过程中诱导光功率和沉积时间来控制金属包层光纤的表面形貌。A metallized tapered optical fiber with high SERS activity was used as a probe. The preparation of the metallized tapered optical fiber probe is tapered first, and then coated with a noble metal layer. Optical fiber tapering adopts thermal tapering method or chemical method; the metallization process of optical fiber adopts light-induced electroless deposition method, and the surface shape of metal-clad optical fiber is controlled by optimizing the induced light power and deposition time in the process of light-induced electroless deposition. appearance.

具体实施例:Specific examples:

1.利用可调谐声致光栅法在光纤中直接产生柱状矢量光:1. Use the tunable acoustic grating method to directly generate columnar vector light in the optical fiber:

如图1所示,线偏振光源1产生线偏振光,带通滤波片2对出射光线宽进行限制,半波片3对线偏振光的偏振方向进行调整,物镜4将空间光耦合进光纤5,光纤中传输的光经滤模器6滤除高阶模后由超声波发生器8加载声波信号,其中声波信号由射频发生器7产生射频信号驱动超声换能器产生。超声波发生器产生的超声波耦合到光纤中传输,在光纤中形成线偏振光栅进行调制,从而将纤芯中的矢量基模转换为柱状矢量光场。As shown in Figure 1, a linearly polarized light source 1 produces linearly polarized light, a bandpass filter 2 limits the width of the outgoing light, a half-wave plate 3 adjusts the polarization direction of the linearly polarized light, and an objective lens 4 couples spatial light into an optical fiber 5 , the light transmitted in the optical fiber is filtered by the mode filter 6 to filter out high-order modes, and then the ultrasonic generator 8 loads the acoustic wave signal, wherein the acoustic wave signal is generated by the radio frequency signal generated by the radio frequency generator 7 to drive the ultrasonic transducer. The ultrasonic wave generated by the sonotrode is coupled to the optical fiber for transmission, and a linear polarization grating is formed in the optical fiber for modulation, thereby converting the vector fundamental mode in the fiber core into a columnar vector light field.

2.利用火焰拉锥法和光诱导化学沉积法制备高SERS活性的镀银光纤探针:2. Preparation of silver-coated fiber optic probes with high SERS activity by using the flame taper method and light-induced chemical deposition method:

首先采用火焰拉锥法制备光纤锥,通过控制拉伸速度来控制锥角大小,使锥角大小约10度,如图2所示。其次采用光诱导无电沉积法在锥形光纤表面镀银,从而制备镀银光纤探针9。400uW线偏振光作为诱导光,酒石酸钾钠和银氨溶液1:1混合液作为反应液,光纤锥竖直浸入反应液中,通光镀20min。制备得到的银层表面粗糙,银纳米颗粒直径约300nm,如图3所示。First, the fiber taper is prepared by the flame tapering method, and the taper angle is controlled by controlling the drawing speed, so that the taper angle is about 10 degrees, as shown in Figure 2. Secondly, light-induced electroless deposition is used to plate silver on the surface of the tapered optical fiber to prepare silver-coated optical fiber probe 9. 400uW linearly polarized light is used as the induction light, and the 1:1 mixture of potassium sodium tartrate and silver ammonia solution is used as the reaction solution. The cone was vertically immersed in the reaction solution, and the light was plated for 20 minutes. The surface of the prepared silver layer is rough, and the diameter of silver nanoparticles is about 300 nm, as shown in FIG. 3 .

3.利用光纤中柱状径向矢量光激发镀银光纤表面拉曼光谱:3. Use the cylindrical radial vector light in the fiber to excite the Raman spectrum on the surface of the silver-coated fiber:

将镀银光纤锥竖直浸入孔雀石绿的酒精分散液中浸泡5min。利用上述光纤中产生的柱状径向矢量光,去激发上述高SERS活性锥形光纤探针表面附着的孔雀石绿分子的拉曼信号。如图1所示,出射信号通过物镜10准直之后,利用长波通带边滤波片11滤除激发光。拉曼信号经光纤适配器12收集,进入拉曼光谱仪13采集。相同激发功率和光纤探针的情况下,拉曼光谱仪积分时间相同,对比柱状矢量光与线偏振激发的SERS信号强度,结果柱状矢量光,包括径向矢量光和角向矢量光,相比线偏振激发均能进一步显著提高光纤表面拉曼散射强度。Soak the silver-plated optical fiber cone vertically in the alcohol dispersion of malachite green for 5 minutes. The columnar radial vector light generated in the optical fiber is used to excite the Raman signal of the malachite green molecule attached to the surface of the tapered optical fiber probe with high SERS activity. As shown in FIG. 1 , after the outgoing signal is collimated by the objective lens 10 , the excitation light is filtered out by a long-wave pass band-edge filter 11 . The Raman signal is collected by the fiber optic adapter 12 and then entered into the Raman spectrometer 13 for collection. In the case of the same excitation power and fiber probe, the integration time of the Raman spectrometer is the same, and the SERS signal intensity of columnar vector light and linearly polarized excitation is compared. The results of columnar vector light, including radial vector light and angular vector light, compared Polarized excitation can further significantly increase the Raman scattering intensity on the fiber surface.

Claims (5)

  1. A kind of 1. method of efficient excitation metallized optical fibre Surface enhanced Raman scattering, it is characterised in that step is as follows:
    Step 1 causes raster method directly to generate column vector light in a fiber using adjustable pictophonetic characters:Optical fiber (5) is placed in preceding object lens (4) in light path, linear polarization light source (1), band pass filter (2) and half-wave plate are equipped in the input path of preceding object lens (4) successively (3);For mode filter (6) set on optical fiber (5) positioned at preceding object lens (4) one end, the output terminal of supersonic generator (8) loads on optical fiber (5) middle part, input terminal connection radio-frequency signal generator (7);
    Start linear polarization light source (1) and radio-frequency signal generator (7), passed in the ultrasonic wave-coupled to optical fiber that supersonic generator generates It is defeated, linear polarization grating is formed in a fiber and is modulated, by rotatable halfwave plate (3) to adjust the polarization side of light source emergent light To, while the frequency of radio-frequency signal generator (7) is adjusted until meeting pattern match, so as to which the vector basic mode in fibre core is converted to column Shape vectorial field;
    Step 2 draws cone method and photoinduction chemical deposition to prepare metallized optical fibre probe using flame:Cone method is drawn to exist using flame One end of optical fiber (5) prepares optical taper, then plates noble metal on conical fiber surface using photoinduction electroless deposition processes, obtains optical fiber (5) the metallized optical fibre probe (9) of one end;
    Step 3 excites metallized optical fibre Surface enhanced Raman spectroscopy using column vector light in optical fiber:By metallized optical fibre probe (9) it immerses vertically in the liquid containing measured matter or the liquid containing measured matter or solid powder is coated in metal Change optical fiber probe (9) surface, the optical fiber (5) with metallized optical fibre probe (9) is placed in the preceding object lens of light path described in step 1 (4) in light path, metallized optical fibre probe (9) front end is equipped with rear object lens (10), is equipped with successively in the injection light path of rear object lens (10) Long wave passband side filter plate (11), fiber adapter (12) and Raman spectrometer (13);
    Start linear polarization light source (1) and radio-frequency signal generator (7), passed in the ultrasonic wave-coupled to optical fiber that supersonic generator generates It is defeated, linear polarization grating is formed in a fiber and is modulated, by rotatable halfwave plate (3) to adjust the polarization side of light source emergent light To, while the frequency of radio-frequency signal generator 7 is adjusted until meeting pattern match, so as to which the vector basic mode in fibre core is converted to column Vectorial field;After the outgoing signal of metallized optical fibre probe (9) is collimated by rear object lens (10), by long wave passband side filter plate (11) exciting light is filtered out, the Raman signal of generation is collected through fiber adapter (12), by Raman spectrometer (13) processing.
  2. 2. the method for metallized optical fibre Surface enhanced Raman scattering is efficiently excited according to claim 1, it is characterised in that:Institute The cone angle for stating optical taper is 30 degree.
  3. 3. the method for efficient excitation metallized optical fibre Surface enhanced Raman scattering according to claim 1 or claim 2, feature exist In:The photoinduction electroless deposition processes are in the method for conical fiber surface metalation:Made with linearly polarized light of the power less than 1mW To induce light, the optical taper that flame draws cone method to prepare is immersed vertically in the chemical reaction liquid for generating noble metal, thang-kng plating 5- 60min。
  4. 4. according to the method for the efficient excitation metallized optical fibre Surface enhanced Raman scattering of claim 1 or 3, feature exists In:The noble metal is gold, silver or copper.
  5. 5. according to the method for the efficient excitation metallized optical fibre Surface enhanced Raman scattering of claim 1 or 3, feature exists In:The layer of precious metal nano surface granular size of the plating noble metal is no more than excitation wavelength size.
CN201810092571.0A 2018-01-31 2018-01-31 Method for efficiently exciting surface-enhanced Raman scattering of metalized optical fiber Expired - Fee Related CN108152267B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810092571.0A CN108152267B (en) 2018-01-31 2018-01-31 Method for efficiently exciting surface-enhanced Raman scattering of metalized optical fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810092571.0A CN108152267B (en) 2018-01-31 2018-01-31 Method for efficiently exciting surface-enhanced Raman scattering of metalized optical fiber

Publications (2)

Publication Number Publication Date
CN108152267A true CN108152267A (en) 2018-06-12
CN108152267B CN108152267B (en) 2020-05-01

Family

ID=62459390

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810092571.0A Expired - Fee Related CN108152267B (en) 2018-01-31 2018-01-31 Method for efficiently exciting surface-enhanced Raman scattering of metalized optical fiber

Country Status (1)

Country Link
CN (1) CN108152267B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021129267A1 (en) * 2019-12-27 2021-07-01 深圳大学 Tip-enhanced raman spectroscope microscopic imaging device
CN113437626A (en) * 2021-05-31 2021-09-24 福州大学 Device and method for enhancing self-excited Raman laser
CN113740877A (en) * 2021-07-21 2021-12-03 万合(洛阳)光电技术有限公司 Low-noise all-time water vapor laser radar detection system
CN114136890A (en) * 2021-12-10 2022-03-04 重庆大学 An adaptation device for hollow-core capillary liquid spectral sensing
CN114509422A (en) * 2022-02-21 2022-05-17 中国计量大学 Fiber-optic surface-enhanced Raman and fluorescence dual-mode detector for endoscope system
CN115774009A (en) * 2022-11-23 2023-03-10 上海理工大学 Method for measuring longitudinal polarization Raman signal based on vector polarization light beam

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120035749A (en) * 2010-10-06 2012-04-16 단국대학교 산학협력단 Simultaneous measuring sensor system of lspr and sers signal based on optical fiber
CN103592282A (en) * 2013-11-11 2014-02-19 北京航空航天大学 A Raman scattering substrate based on conductive surface plasmons and its application method
CN105137624A (en) * 2015-09-25 2015-12-09 西北工业大学 Device and method for generating columnar vector beams in optical fiber by utilizing electrically-controlled tunable optical grating
CN105510640A (en) * 2015-11-27 2016-04-20 武汉大学 Metal nanowire surface plasmon nano light source-based optical microscope
CN105973868A (en) * 2016-05-09 2016-09-28 西北工业大学 Optical fiber vector optical probe type tip-enhanced Raman spectroscopy and spectrum collection method
CN106124478A (en) * 2016-08-18 2016-11-16 东南大学 The fiber Raman of tapered fiber and microspheres lens strengthens probe and manufacture method
CN107561057A (en) * 2017-08-21 2018-01-09 重庆大学 Double enhancing Raman detection systems with local surface plasma amplifier

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120035749A (en) * 2010-10-06 2012-04-16 단국대학교 산학협력단 Simultaneous measuring sensor system of lspr and sers signal based on optical fiber
CN103592282A (en) * 2013-11-11 2014-02-19 北京航空航天大学 A Raman scattering substrate based on conductive surface plasmons and its application method
CN105137624A (en) * 2015-09-25 2015-12-09 西北工业大学 Device and method for generating columnar vector beams in optical fiber by utilizing electrically-controlled tunable optical grating
CN105510640A (en) * 2015-11-27 2016-04-20 武汉大学 Metal nanowire surface plasmon nano light source-based optical microscope
CN105973868A (en) * 2016-05-09 2016-09-28 西北工业大学 Optical fiber vector optical probe type tip-enhanced Raman spectroscopy and spectrum collection method
CN106124478A (en) * 2016-08-18 2016-11-16 东南大学 The fiber Raman of tapered fiber and microspheres lens strengthens probe and manufacture method
CN107561057A (en) * 2017-08-21 2018-01-09 重庆大学 Double enhancing Raman detection systems with local surface plasma amplifier

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021129267A1 (en) * 2019-12-27 2021-07-01 深圳大学 Tip-enhanced raman spectroscope microscopic imaging device
CN113437626A (en) * 2021-05-31 2021-09-24 福州大学 Device and method for enhancing self-excited Raman laser
CN113437626B (en) * 2021-05-31 2022-07-12 福州大学 A device and method for enhancing self-excited Raman laser
CN113740877A (en) * 2021-07-21 2021-12-03 万合(洛阳)光电技术有限公司 Low-noise all-time water vapor laser radar detection system
CN113740877B (en) * 2021-07-21 2024-09-27 万合(洛阳)光电技术有限公司 Low-noise all-day-time water vapor laser radar detection system
CN114136890A (en) * 2021-12-10 2022-03-04 重庆大学 An adaptation device for hollow-core capillary liquid spectral sensing
CN114136890B (en) * 2021-12-10 2024-03-29 重庆大学 Adapting device suitable for hollow capillary liquid spectrum sensing
CN114509422A (en) * 2022-02-21 2022-05-17 中国计量大学 Fiber-optic surface-enhanced Raman and fluorescence dual-mode detector for endoscope system
CN115774009A (en) * 2022-11-23 2023-03-10 上海理工大学 Method for measuring longitudinal polarization Raman signal based on vector polarization light beam

Also Published As

Publication number Publication date
CN108152267B (en) 2020-05-01

Similar Documents

Publication Publication Date Title
CN108152267A (en) A kind of method of efficient excitation metallized optical fibre Surface enhanced Raman scattering
US8358407B2 (en) Enhancing signals in Surface Enhanced Raman Spectroscopy (SERS)
CN101713738B (en) Surface-enhanced Raman scattering optical fiber probe
US10914684B2 (en) In-situ photocatalysis monitoring system based on surface-enhanced raman scattering spectroscopy
CN103868887A (en) Graphene film-based tapered optical fiber sensor
CN107561057B (en) Dual-Enhanced Raman Detection System with Localized Surface Plasmon Amplifier
Weber et al. Far-and near-field properties of gold nanoshells studied by photoacoustic and surface-enhanced Raman spectroscopies
Li et al. Polarization-dependent surface plasmon-driven catalytic reaction on a single nanowire monitored by SERS
US20110267610A1 (en) Compact sensor system
CN105973868A (en) Optical fiber vector optical probe type tip-enhanced Raman spectroscopy and spectrum collection method
CN108375565A (en) A kind of nano-cone array composite S RES substrates and preparation method
Yuan et al. Comparison of silica and sapphire fiber SERS probes fabricated by a femtosecond laser
Cao et al. Laser-induced synthesis of Ag nanoparticles on the silanized surface of a fiber taper and applications as a SERS probe
Yang et al. Sensitive gap-enhanced Raman spectroscopy with a perfect radially polarized beam
CN108281884B (en) Raman spectrum detection device adopting Fabry-Perot resonant cavity enhancement mode
CN109520990B (en) A method for preparing tapered fiber SERS probe by laser-induced one-step pulling method
Lu et al. Tip-based plasmonic nanofocusing: vector field engineering and background elimination
CN109580578B (en) Evanescent wave optical fiber SERS probe and preparation method thereof
CN217688576U (en) A Raman Detection System with Surface Enhancement on the Inner Wall of Optical Fiber
Dutta et al. SERS activity of photoreduced silver chloride crystals
Pham et al. Fabrication of silver nano-dendrites on optical fibre core by laser-induced method for surface-enhanced Raman scattering applications
Tsoulos et al. Rational Design of Gold Nanostars with Tailorable Plasmonic Properties
Narayanan et al. Detection of dye molecules through photonic crystal assisted surface enhanced Raman scattering
Hamzah et al. The Raspberry-like nanostructures (SiO2@ AgNPs) fabricated by electrical exploding wire (EEW) technique for Raman scattering enhancement
CN218121767U (en) High-sensitivity surface enhanced Raman system based on U-shaped reflection cavity

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20200501

CF01 Termination of patent right due to non-payment of annual fee