Abstract
We propose a transmission enhanced surface plasmon resonance nano-microscope. The nano-microscope is prepared at the cone-frustum-shaped annular-core fiber (ACF) end by mechanical polishing at the end of the ACF, and the gold film deposition on this end surface through magnetron sputtering technology obtains an excited surface plasmon resonance (SPR) that can direct to the center along the radial direction of the fiber. The cone-frustum-shaped ACF end surface is taken as a stage, and with the advantage of the SPR resonance enhancement effect, the ordinary microscope can realize nano-imaging. The imaging experiment results of 300nm polystyrene nano-spheres show that this auxiliary microscopic imaging technology can break through the diffraction limit and can eliminate the smear image caused by the surface plasmon wave (SPW) illumination in a single direction.
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