Vectorial modeling of near-field imaging with uncoated fiber probes: Transfer function and resolving power
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.
Cite
@article{arxiv.physics/0608291,
title = {Vectorial modeling of near-field imaging with uncoated fiber probes: Transfer function and resolving power},
author = {Niels Gregersen and Bjarne Tromborg and Sergey I. Bozhevolnyi},
journal= {arXiv preprint arXiv:physics/0608291},
year = {2009}
}