| Autor: |
Petr Dvořák, Pavel Klok, Michal Kvapil, Martin Hrtoň, Petr Bouchal, Jan Krpenský, Vlastimil Křápek, Tomáš Šikola |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Nanophotonics. 2022, vol. 11, issue 19, p. 1-12. |
| ISSN: |
2192-8614 |
| Popis: |
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. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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