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arXiv · 1803.01155

A mathematical and numerical framework for near-field optics

Habib Ammari·Doo Sung Choi·Sanghyeon Yu
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Abstract

This paper is concerned with the inverse problem of reconstructing small and local perturbations of a planar surface using the field interaction between a known plasmonic particle and the planar surface. The aim is to perform a super-resolved reconstruction of these perturbations from shifts in the plasmonic frequencies of the particle-surface system. In order to analyze the interaction between the plasmonic particle and the planar surface, a well chosen conformal mapping, which transforms the particle-surface system into a coated structure, is used. Then the even Fourier coefficients of the transformed domain are related to the shifts in the plasmonic resonances of the particle-surface system. A direct reconstruction of the perturbations of the planar surface is proposed. Its viability and limitations are documented by numerical examples.

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Habib Ammari, Doo Sung Choi, Sanghyeon Yu. 2018-08-31. A mathematical and numerical framework for near-field optics. https://doi.org/10.1098/rspa.2018.0150

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