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Title: Structured Light: Ideas and Concepts
Authors: Angelsky, Oleg V.
Bekshaiev, Oleksandr Yа.
Hanson, Steen G.
Zenkova, Claudia Yu.
Mokhun, Igor I.
Jun, Zheng
Citation: Frontiers in Physics
Issue Date: 2020
Keywords: singular optics
optical vortex
polarization singularity
dynamical characteristics
paraxial beams
evanescent fields
optical manipulation
optical data processing
Series/Report no.: ;Vol. 8.
Abstract: The paper briefly presents some essential concepts and features of light fields with strong spatial inhomogeneity of amplitude, phase, polarization, and other parameters. It contains a characterization of optical vortices, speckle fields, polarization singularities. A special attention is paid to the field dynamical characteristics (energy, momentum, angular momentum, and their derivatives), which are considered not only as mechanical attributes of the field but also as its meaningful and application-oriented descriptive parameters. Peculiar features of the light dynamical characteristics in inhomogeneous and dispersive media are discussed. The dynamical properties of paraxial beams and evanescent waves (including surface plasmon–polaritons) are analyzed in more detail; in particular, a general treatment of the extraordinary spin and momentum, orthogonal to the main propagation direction, is outlined. Applications of structured light fields for optical manipulation, metrology, probing, and data processing are described.
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