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- Title
Two-dimensional quantitative near-field phase imaging using square and hexagonal interference devices.
- Authors
Dvořák, Petr; Klok, Pavel; Kvapil, Michal; Hrtoň, Martin; Bouchal, Petr; Krpenský, Jan; Křápek, Vlastimil; Šikola, Tomáš
- Abstract
We demonstrate the formation of the near field with non-trivial phase distribution using surface plasmon interference devices, and experimental quantitative imaging of that phase with near-field phase microscopy. The phase distribution formed with a single device can be controlled by the polarization of the external illumination and the area of the device assigned to the object wave. A comparison of the experimental data to a numerical electromagnetic model and an analytical model assigns the origin of the near-field phase to the out-of-plane electric component of surface plasmon polaritons, and also verifies the predictive power of the models. We demonstrate a formation of near-field plane waves with different propagation directions on a single device, or even simultaneously at distinct areas of a single device. Our findings open the way to the imaging and tomography of phase objects in the near field.
- Subjects
NEAR-field microscopy; COMPUTATIONAL electromagnetics; THEORY of wave motion; PLANE wavefronts; PREDICTION models; CRYSTAL lattices; POLARITONS; ALGEBRAIC field theory
- Publication
Nanophotonics (21928606), 2022, Vol 11, Issue 19, p4375
- ISSN
2192-8606
- Publication type
Article
- DOI
10.1515/nanoph-2022-0215