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Two-dimensional quantitative near-field phase imaging using square and hexagonal interference devices
DOI:10.1515/nanoph-2022-0215.png)
摘要
En 中文
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.
Keyword:
interference nanostructures
near-field
phase imaging
SNOM
SPP waves
期刊
IF:
6.6
论文数:
3.0K
被引数:
1.6W
机构
引用论文
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OPTICS LETTERS
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OPTICS LETTERS
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