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Logarithmic nonlinear metal cone probe

A nonlinear and logarithmic technology, applied in the field of optics and optoelectronics, can solve the problems of non-linear characteristics, surface plasmon research and application limitations, etc., and achieve the effect of improving sensitivity, realizing manipulation and screening

Inactive Publication Date: 2018-11-20
NANKAI UNIV
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  • Claims
  • Application Information

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Problems solved by technology

At present, there are a variety of metal structures that enhance nano-focusing, among which the most commonly used is the metal nano-linear tapered structure, but there are limitations in the focusing of linear nano-structures, which can focus the light field by changing the radius of curvature, and do not have nonlinear characteristics. , making the research and application of surface plasmons have limitations

Method used

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  • Logarithmic nonlinear metal cone probe
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Embodiment 1

[0018] Such as figure 1 As shown, a logarithmic nano-metal nonlinear tapered probe with high spatial resolution, high sensitivity, and strong longitudinal polarization electric field can be generated. The probe is composed of a logarithmic metal nano-non-linear tapered structure. The structural equation h(ρ,θ) of the needle in the cylindrical coordinate system is:

[0019]

[0020] Where: ρ and θ are the radius and angle in the cylindrical coordinate system, h 0 is the preset height parameter, R is the radius of the bottom surface, h 0 and the size of R is on the order of nanometers. N is a logarithmic nonlinear factor, and 24≤N≤27, and N is a positive integer.

[0021] The manufacture of logarithmic nonlinear metal cone probe in the present invention can be realized by electrochemical method. The specific steps are as follows:

[0022] (1) Using the corrosiveness of ammonia water and the etching of the programmable motor to control the metal wire, a linear tapered str...

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Abstract

The invention provides a logarithmic type non-linear metal taper probe which is high in space resolution and flexibility and capable of generating strong longitudinal polarization electric field. The probe is formed by a logarithmic type metal nano non-linear taper structure. When incident light, especially radial polarized light, irradiates the bottom of the logarithmic type non-linear metal taper probe, the incident light energy is converted into surface plasmons. The plasmons are transmitted along the bending surface of the non-linear metal nano taper, and are compressed into the top end so as to form highly locally enhanced electromagnetic field distribution, thereby obtaining strong nano focusing. According to the invention, the probe can be used as a probe of a scanning probe microscope like a scanning near-field microscope and an atomic force microscope, and of a tip enhanced roman spectroscopy, and has high application value in fields like single-molecule imaging, heat auxiliary magnetic recording, nano-sensing, nano-imaging, nano-lithography and nano-control.

Description

technical field [0001] The invention belongs to the field of optics and optoelectronic technology, and relates to a nano optoelectronic device, surface plasmon excitation, nano focus and vector field, in particular a metal photoelectric probe with high spatial resolution, high sensitivity and capable of generating strong longitudinally polarized electric field. Background technique [0002] Generating nanofocused strong fields with large longitudinally polarized electric field components is crucial for improving single-molecule imaging, heat-assisted magnetic recording, nanolithography, and induced thermal electrons. At present, there are a variety of metal structures that enhance nano-focusing, among which the most commonly used is the metal nano-linear tapered structure, but there are limitations in the focusing of linear nano-structures, which can focus the light field by changing the radius of curvature, and do not have nonlinear characteristics. , making the research an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01Q70/10G01Q60/22G01Q60/38G01N21/65
CPCG01N21/658G01Q60/22G01Q60/38G01Q70/10
Inventor 匡登峰程芳董立群
Owner NANKAI UNIV
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