Characterization of V-shaped plasmon polariton waveguides using a differential heterodyne microscope at single polarization

Akhmedzhanov, I. M.; Baranov, D. V.; Zolotov, Evgenii M

doi:10.1088/1054-660x/24/8/085901

Cited by 5 publications

(1 citation statement)

References 7 publications

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“…1). The SDHM has already been successfully applied for the characterization of integrated optical channel waveguides [17], channel plasmon waveguides [18] and diffraction gratings [19], but its use and potential as an experimental tool for the characterization of phase-gradient metasurfaces has so far not been considered. While the idea of using the SDHM for the metasurface characterization is straightforward, one should first properly analyse the SDHM response in the case of reflective phase-gradient metasurfaces before embarking on the corresponding experimental investigations.…”

Section: Introductionmentioning

confidence: 99%

Scanning differential microscopy for characterization of reflecting phase-gradient metasurfaces

Akhmedzhanov

Bozhevolnyi²

2018

Optics Communications

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Gap-plasmon based phase-gradient metasurfaces operating in reflection are widely used for the realization of diverse flat optical components, ranging from spectropolarimeters to efficient couplers for surface waves. Successful implementation of carefully designed metasurfaces is however often hampered by technological imperfections that could be related to deviations of geometrical parameters of fabricated nanostructures from the designed ones or material properties, such as the metal and/or dielectric susceptibilities, from the handbook data. While the overall performance of fabricated components might indicate the existence of a potential problem, it is very difficult to identify its origin, which, for example, can simply be related to the deviation in only one cell of the metasurface supercell. We suggest exploiting well-developed experimental techniques of scanning differential heterodyne microscopy (SDHM) to characterize fabricated phase-gradient metasurfaces designed to operate in reflection. We further establish that, by carefully measuring the SDHM response of a gradient metasurface, one should be able of detecting small (~ 5%) amplitude and phase deviations (with respect to the design values) in the optical field reflected by an individual subwavelength-sized cell of the metasurface supercell. Research highlights Сomplex scanning differential heterodyne microscope (SDHM) response of phase-gradient metasurfaces operating in reflection is numerically investigated, revealing a direct relationship between the SDHM phase response and the average phase gradient of the metasurface. Furthermore, we establish that small (~ 5%) amplitude and phase deviations (from the design values) in the complex reflection of an individual subwavelength-sized cell of the metasurface supercell can be detected by analysing the SDHM response.

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Section: Introductionmentioning

confidence: 99%

Scanning differential microscopy for characterization of reflecting phase-gradient metasurfaces

Akhmedzhanov

Bozhevolnyi²

2018

Optics Communications

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Superresolution effect on a microstep phase image in a laser heterodyne microscope

et al. 2019

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The possibility of achieving superresolution on a microstep phase image in a laser scanning differential heterodyne microscope is studied both heoretically and experimentally. The superresolution is estimated as the width ratio for the amplitude and phase components of the microscope response measured at half the height of the corresponding parts of the response. It is shown theoretically that superresolution greatly exceeding unity can be achieved for an object in the form of a phase microstep introducing a phase shift equal to π. Superresolution of ∼2 is experimentally obtained for certified test micro-objects. A possibility of tuning a test sample into the superresolution regime by shifting a point photodetector in the microscope’s Fourier plane is demonstrated.

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Analysis of the accuracy of the inverse problem solution for a differential heterodyne microscope as applied to rectangular plasmonic waveguides

2016

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Characterization of V-shaped plasmon polariton waveguides using a differential heterodyne microscope at single polarization

Cited by 5 publications

References 7 publications

Scanning differential microscopy for characterization of reflecting phase-gradient metasurfaces

Scanning differential microscopy for characterization of reflecting phase-gradient metasurfaces

Superresolution effect on a microstep phase image in a laser heterodyne microscope

Analysis of the accuracy of the inverse problem solution for a differential heterodyne microscope as applied to rectangular plasmonic waveguides

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