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Vectorial modeling of near-field imaging with uncoated fiber probes: Transfer function and resolving power

Niels Gregersen·Bjarne Tromborg·Sergey I. Bozhevolnyi
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Abstract

Using exact three-dimensional vectorial simulations of radiation coupling into uncoated dielectric fiber probes, we calculate amplitude transfer functions for conical single-mode fiber tips at the light wavelength of 633 nm. The coupling efficiency of glass fiber tips is determined in a wide range of spatial frequencies of the incident radiation for opening angles varying from 30 to 120 degrees. The resolution in near-field imaging with these tips is considered for field distributions limited in both direct and spatial-frequency space. The characteristics of the transfer functions describing the relation between probed optical fields and near-field images are analyzed in detail. The importance of utilizing a perfectly sharp tip is also examined.

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Niels Gregersen, Bjarne Tromborg, Sergey I. Bozhevolnyi. 2006-08-30. Vectorial modeling of near-field imaging with uncoated fiber probes: Transfer function and resolving power. https://doi.org/10.1364/ao.45.008739

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