Three-dimensional nanoscale optical vortex profilometry

Sokolenko, Bogdan V.; Poletaev, D. A.

doi:10.1117/12.2273395

Cited by 7 publications

(4 citation statements)

References 18 publications

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“…Light beams with a shaped phase and amplitude of the optical field have attracted the attention of many research groups due to their fascinating optical properties and potential applications. Their properties have been exploited in various fields of classical and quantum optics, being used not only in optical manipulation [1,2], optical metrology [3][4][5][6], microscopy [7][8][9], coronography [10] and free space communications [11] but also in the detection of rotating black holes [12] and photon entanglement [13,14].…”

Section: Introductionmentioning

confidence: 99%

Phase recovery with the optical vortex microscope

Popiołek-Masajada

Masajada

Lamperska

2019

Meas. Sci. Technol.

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In this work we present the principles of recovering the phase shift introduced by the phase sample in an optical vortex scanning microscope. In this microscope a Gaussian beam with an embedded vortex illuminates the sample and then is imaged onto the observation plane of the microscope. When the sample interacts with the vortex beam, its internal structure is modified. In the case of a uniform phase change inside the focused vortex spot, the modification manifests itself as a rotation of the phase image. We show that using a vortex microscope setup we can obtain a high accuracy of the measured phase shift. The second advantage of our system is its very precise tracking of the vortex point.

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Section: Introductionmentioning

confidence: 99%

Phase recovery with the optical vortex microscope

Popiołek-Masajada

Masajada

Lamperska

2019

Meas. Sci. Technol.

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“…This observation suggests the need to adjust the parameter S to accommodate the alterations in pattern size resulting from changes in aperture dimensions. It turns out that we can relate the extent of the pattern with the triangular aperture size and pinhole size using equation (7). However, when S remains constant across all values of R, smaller scanning apertures excel in pinpointing the near-zero or minimal intensities.…”

Section: Resultsmentioning

confidence: 99%

“…These light beams are characterized by a discontinuity of the angular phase, exp (iℓϕ), which leads to a vortex at the center of the beam. The study on OVs in these beams has revolutionized the applications of light beams in advanced optical manipulations [5,6], surface profilometry [7,8], rotation speed detection [9,10] and exoplanet observation [11,12] to name a few because of these properties.…”

Section: Introductionmentioning

confidence: 99%

Vortex position detection using a scanning triangular aperture in a digital micromirror device

Banguilan,

Hermosa

2024

J. Opt.

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Optical vortices, as solutions to the wave equation, remain stable under ideal theoretical conditions. However, in experiments where beams produced with holograms and spatial light modulators introduce perturbations, their phase structures can be disrupted, leading to instability. Specifically, higher-order optical vortices (with topological charge |l| > 1) are inherently unstable in that they tend to separate in a series of optical vortices with unit topological charge (|l| = 1) even with small perturbations. In this work, we demonstrate a technique to detect the positions of optical vortices using a scanning triangular aperture in a digital micromirror device (DMD) and a digital pinhole. We observe the diffraction patterns of a vortex through the triangular aperture, and we show that we can determine the center of an optical vortex by measuring the intensity at the center of a pattern using a digital pinhole. We investigate the changes in the measured signal for different triangular apertures and pinhole sizes. We observe that while smaller pinholes lead to a decrease in light intensity, the detected position of a single optical vortex with unit topological charge is similar for all pinhole sizes. We also find that the triangular aperture size becomes important when locating vortex pairs. Using a triangular aperture with a radius R = 0.52 mm, we can resolve optical vortex pairs at least 86.4 μm apart in our experiments. Our methods help pave the way to understanding the fundamental behavior of multiple vortex interactions in optical beams and also can be used when determining the position of an optical vortex in metrology.

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“…The recognition resolution for the 2D and 3D shape of optically transparent and reflecting surfaces could reach up to 5 nm with a wavelength of 632.8 nm. [9][10][11] Subsequently, an extensive research showed that PSI could be employed to estimate the refractive index from the rotation angle of the reconstructed vortex phase. 12 Meanwhile, Xu proposed and experimentally demonstrated vortex interferometry could be used for reliable characterization of phase properties introduced by meta-structures.…”

Section: Introductionmentioning

confidence: 99%

Deep-learning-based high-resolution recognition of rotating interference images in vortex beam interferometry

Sun,

Yao,

Geng

et al. 2023

Fifth International Symposium on High Power Laser Science and Engineering (HPLSE 2023)

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Three-dimensional nanoscale optical vortex profilometry

Cited by 7 publications

References 18 publications

Phase recovery with the optical vortex microscope

Phase recovery with the optical vortex microscope

Vortex position detection using a scanning triangular aperture in a digital micromirror device

Deep-learning-based high-resolution recognition of rotating interference images in vortex beam interferometry

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