Singular skeleton chains formed by the quasi-plane wave and the Laguerre-Gaussian beam after passing the double-phase-ramp converter

A. Khoroshun; A. Chernikh; A. Riazantsev; O. Ryazantsev; S. Sato; Y. Kozawa; J. Masajada; A. Popiolek-Masajada; M. Szatkowski; A. Bekshaev; A. Ferrando

doi:10.1117/12.2556245

6 February 2020 Singular skeleton chains formed by the quasi-plane wave and the Laguerre-Gaussian beam after passing the double-phase-ramp converter

A. Khoroshun, A. Chernikh, A. Riazantsev, O. Ryazantsev, S. Sato, Y. Kozawa, J. Masajada, A. Popiolek-Masajada, M. Szatkowski, A. Bekshaev, A. Ferrando

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Proceedings Volume 11369, Fourteenth International Conference on Correlation Optics; 113690M (2020) https://doi.org/10.1117/12.2556245
Event: Fourteenth International Conference on Correlation Optics, 2019, Chernivtsi, Ukraine

Abstract

A full comparative analysis of the chain of phase singularities generated when a quasi-plane wave and a Gaussian beam pass a double-phase-ramp (DPR) converter is presented based on the theoretical and experimental data. The overall output beam structure includes a system of interrelated optical vortices (OVs) whose linear trajectories form a threedimensional singular skeleton which can be applied for the trapping and guiding of microparticles. An internal structure of each individual phase singularity is characterized by the OV topological charge and by the morphology parameters of the equal intensity ellipses in the OV-core area. The rectilinear equidistant OV trajectories form a chain in the transverse cross section, and their identical morphology parameters can be useful for the applications to metrology and micromanipulation. As a separate result, we consider the DPR-induced transformations of the incident Laguerre-Gaussian beams of the lowest orders and show that the incident multicharged OVs are transformed into small sub-chains of the OVs located in the near-axial region.

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A. Khoroshun, A. Chernikh, A. Riazantsev, O. Ryazantsev, S. Sato, Y. Kozawa, J. Masajada, A. Popiolek-Masajada, M. Szatkowski, A. Bekshaev, and A. Ferrando "Singular skeleton chains formed by the quasi-plane wave and the Laguerre-Gaussian beam after passing the double-phase-ramp converter", Proc. SPIE 11369, Fourteenth International Conference on Correlation Optics, 113690M (6 February 2020); https://doi.org/10.1117/12.2556245

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