Optimized measurement probe of the localized surface plasmon microscope by using radially polarized illumination

Abstract

We report on an experimental result confirming the optimization of the measurement probe of the localized surface plasmon microscope. We introduce axially symmetric radial polarization for this purpose. To generate radially polarized light, we utilize a combined polarizer and liquid crystal cell. We demonstrate the imaging of a pointlike object, and visualize the measurement probe with the profile of a single peak.

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“…22 To simplify matters, we may also assume that the secondary field contribution emerge only in the latter image ( 1 = 0, 2 = 1):…”

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“…Its ability to be focused tighter is desirable in optical data storage [1], optical trapping of metallic particles [2] and measurement probe optimization for localized surface plasmon microscopy [3]. It can also be used to enhance laser machining [4] and for focus shaping [5].…”