Reverse flux of energy of a nonparaxial optical vortex in the near field
V. V. Kotlyarab, A. A. Kovalevab
a Samara National Research University, 443086, Russia, Samara, Moskovskoye Shosse 34
b IPSI RAS - Branch of the FSRC “Crystallography and Photonics” RAS, 443001, Samara, Russia, Molodogvardeyskaya 151
In this work, using an expansion in terms of plane waves, we obtain all six components of the electric and magnetic field vectors for an elliptically polarized optical vortex with an arbitrary integer topological charge. We also obtain expressions for the distributions of the field intensity and the Poynting vector components in the initial plane of this optical vortex. For the particular case of a narrow angular spectrum of plane waves (Bessel beam) and for circular polarization, it is shown that in the presence of inhomogeneous evanescent waves in the initial light field, a reverse flux of light energy can occur near the optical axis. It is also shown that in the initial plane the effect of an “angular tractor” occurs, when at different distances from the optical axis the transverse energy flux rotates clockwise or counterclockwise. Using the obtained general expressions, the light flux for other known exact solutions of the Maxwell equations can be analyzed.
optical vortex, angular spectrum of plane waves, evanescent waves, Poynting vector, reverse power flow, optical "tractor".
|Russian Science Foundation
|Russian Foundation for Basic Research
|Russian Academy of Sciences - Federal Agency for Scientific Organizations
|This work was partly funded by the RF Ministry of Science and Higher Education within the state project of the FSRC “Crystallography and Photonics” RAS under agreement 007-ÃÇ/×3363/26 (“Intensity and longitudinal component of the Poynting vector”), the Russian Science Foundation under project No. 17-19-01186 (“Reverse flux of energy in the initial plane” and “Transverse components of the Poynting vector”), and the Russian Foundation for Basic Research under projects ## 18-29-20003, 18-07-01129 (“Simulation”).
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V. V. Kotlyar, A. A. Kovalev, “Reverse flux of energy of a nonparaxial optical vortex in the near field”, Computer Optics, 43:1 (2019), 54–62
Citation in format AMSBIB
\by V.~V.~Kotlyar, A.~A.~Kovalev
\paper Reverse flux of energy of a nonparaxial optical vortex in the near field
\jour Computer Optics
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