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This article is cited in 4 scientific papers (total in 4 papers)
OPTO-IT
Energy flux of a vortex field focused using a secant gradient lens
A. G. Nalimovab a IPSI RAS – Branch of the FSRC "Crystallography and Photonics" RAS,
443001, Samara, Russia, Molodogvardeyskaya 151
b IPSI RAS – Branch of the FSRC "Crystallography and Photonics" RAS,
443001, Samara, Russia, Molodogvardeyskaya 151
Abstract:
In this paper we simulated the focusing of left circular polarized beam with a second order phase vortex and a second-order cylindrical vector beam by a gradient index Mikaelian lens. It was shown numerically, that there is an area with a negative Poynting vector projection on Z axis, that can be called an area with backward energy flow. Using a cylindrical hole in the output surface of the lens and optimizing it one can obtain a negative flow, which will be situated in the maximum intensity region, unlike to previous papers, in which such backward energy flow regions were situated in a shadow area. Thereby, this lens will work as an “optical magnet”, it will attract Rayleigh particles (with diameter about 1/20 of the wavelength) to its surface.
Keywords:
Poynting vector, energy backflow, gradient index lens, cylindrical vector beam, optical vortex.
Received: 09.01.2020 Accepted: 13.05.2020
Citation:
A. G. Nalimov, “Energy flux of a vortex field focused using a secant gradient lens”, Computer Optics, 44:5 (2020), 707–711
Linking options:
https://www.mathnet.ru/eng/co839 https://www.mathnet.ru/eng/co/v44/i5/p707
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