Superresolution Processing of the Response in Scanning Differential Heterodyne Microscopy

Baranov, D. V.; Zolotov, Evgenii M

doi:10.1117/3.793309.ch12

Cited by 4 publications

(6 citation statements)

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“…In the second approach, we used a special linearization procedure 39 for the processing of phase response obtained at ε=0.2 μm. In this procedure, the differential phase response is numerically processed to derive a linear phase response, which gives the phase profile of the investigated object and can be considered as a reconstructed phase object profile with diffraction-limited resolution.…”

Section: Resultsmentioning

confidence: 99%

“…Note that we cannot increase the value of ε excessively due to the fact that the second edge of the stripe could affect the response nearby the first edge. The compromise for the SDHM setup could be reached at ε In the second approach, we used a special linearization procedure 39 for the processing of phase response obtained at ε ¼ 0.2 μm. In this procedure, the differential phase response is numerically processed to derive a linear phase response, which gives the phase profile of the investigated object and can be considered as a reconstructed phase object profile with diffraction-limited resolution.…”

Section: Resultsmentioning

confidence: 99%

“…The amplitude and phase of the signal depend nonlinearly on the local surface reflection coefficient. However, it is possible to restore the profile of the local amplitude-phase reflection coefficient of the object using a special linearization procedure 39 . Previously, we presented the image formation theory of SDHM using the approximate scalar theory of light diffraction 39 and rigorous vector diffraction theory 40 .…”

Section: Laser Heterodyne Microscopementioning

confidence: 99%

“…However, it is possible to restore the profile of the local amplitude-phase reflection coefficient of the object using a special linearization procedure 39 . Previously, we presented the image formation theory of SDHM using the approximate scalar theory of light diffraction 39 and rigorous vector diffraction theory 40 . We treat plasmonic metasurface as a thin phase screen; therefore, we can apply the scalar version of the image formation theory.…”

Section: Laser Heterodyne Microscopementioning

confidence: 99%

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Superresolution in phase image of π-phase step on plasmonic metasurface using differential heterodyne microscope

2023

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We investigated the scanning differential heterodyne microscope response for a plasmonic metasurface-dielectric film system. Superresolution effect for microscope phase response with 6.5 superresolution coefficient in the vicinity of π optical phase increment was observed. Use of an additional dielectric film allowed local adjustment of the optical phase increment over a wide range (0 deg to 100 deg). The ability to adjust the width of the phase response function by changing the microscope heterodyne frequency has been demonstrated experimentally.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Laser Heterodyne Microscopementioning

confidence: 99%

Section: Laser Heterodyne Microscopementioning

confidence: 99%

See 2 more Smart Citations

Superresolution in phase image of π-phase step on plasmonic metasurface using differential heterodyne microscope

2023

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“…For more accurate recovery of the amplitude-phase reflection coefficient, as a function of the coordinate, and for more complicated optical profiles generally one should solve the inverse problem for the SDHM response. Different approaches exist for this purpose depending on the type of an object under investigation 16 . In our opinion, the method based on the linearization of the SDHM response, which is obviously nonlinear with respect to reflection coefficient 10 , is of particular interest.…”

Section: Sdhm Response Basics and Interpretationmentioning

confidence: 99%

Characterization of gap-plasmon based metasurfaces using scanning differential heterodyne microscopy

Akhmedzhanov

Deshpande

Baranov

et al. 2020

Sci Rep

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Optical phase-gradient metasurfaces, whose unique capabilities are based on the possibility to arbitrarily control the phase of reflected/transmitted light at the subwavelength scale, are seldom characterized with direct measurements of phase gradients. Using numerical simulations and experimental measurements, we exploit the technique of scanning differential heterodyne microscopy (SDHM) for direct phase and amplitude characterization of gap-plasmon based optical metasurfaces. Two metasurface configurations utilizing the third-order gap surface plasmon (GSP) resonance, representing a binary grating and linear phase gradient, are experimentally characterized with the SDHM operating at the light wavelength of 633 nm. Comparing the experimental performances of these GSP metasurfaces with those expected from the phase and amplitude profiles reconstructed from the SDHM measurements, we verify the efficiency and accuracy of the developed SDHM characterization approach for direct inspection of GSP reflective metasurfaces.

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

Akhmedzhanov¹,

Baranov²,

Zolotov³

2014

Laser Phys.

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The possibility of using a scanning differential heterodyne microscope for characterization of V-shaped plasmon waveguides is demonstrated. To characterize a waveguide profile, a specific algorithm based on solution of the inverse problem is proposed. The microscope response library at various waveguide parameters is calculated using the image formation theory and rigorous couple wave analysis for matching with experimentally measured responses. The investigation of stability of the inverse problem solution has revealed unstable zones within specified ranges of waveguide parameters. Further analysis shows that these zones can be shifted with variation of the probing beam wavelength.

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Superresolution Processing of the Response in Scanning Differential Heterodyne Microscopy

Cited by 4 publications

References 0 publications

Superresolution in phase image of π-phase step on plasmonic metasurface using differential heterodyne microscope

Superresolution in phase image of π-phase step on plasmonic metasurface using differential heterodyne microscope

Characterization of gap-plasmon based metasurfaces using scanning differential heterodyne microscopy

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

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