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We investigate the performance of a simple corrugated aperture scanning near-field optical microscope (SNOM) probe with various cladding metals. The probes have only one corrugation, however, they offer increased transmission over both uncorrugated probes and those with many grooves. Enhancement of light throughput results from excitation of surface plasmons at the corrugation at the core-cladding interface. We show how the choice of metal influences radiation properties of grooved probes.

Performance of Scanning Near-Field Optical Microscope Probes with Single Groove and Various Metal Coatings