e-Exponential Nonlinear Nanometal Cone Probe
A nano-metal, nonlinear technology, applied in the field of optics and optoelectronics, to achieve the effect of improving sensitivity
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[0022] Such as figure 1 As shown, an e-index 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 an e-index metal nano-non-linear tapered structure. The structural equation h(ρ) of the needle in the cylindrical coordinate system is:
[0023]
[0024] Where: ρ is the radius in the cylindrical coordinate system, h 0 is the preset height parameter, r 0 is the preset base radius, h 0 and r 0 size on the nanometer scale. a is an exponential nonlinear factor of e, and 0.04≤α≤0.055, (the variation range of a is 0.005), Δh is a height modulation factor, and 4≤Δh≤12, Δh is an integer.
[0025] The fabrication of e-exponential nonlinear metal cone probe in the present invention can be realized by electrochemical method. The specific steps are as follows:
[0026] (1) Use ferric chloride solution with a mass fraction of 40% as the electrolyte, copper wir...
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