Longitudinal component of the Poynting vector of a tightly focused optical vortex with circular polarization
Stafeev S.S., Nalimov A.G.

Image Processing Systems Institute оf RAS – Branch of the FSRC “Crystallography and Photonics” RAS, Samara, Russia,
Samara National Research University, Samara, Russia

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Abstract:
We numerically investigated the focusing of optical vortices with the wavelength λ = 532 nm and right-hand circular polarization by using a diffractive lens with the numerical aperture NA = 0.95. The simulation was carried out using the Richards-Wolf formulae and the FDTD-method. The focusing of optical vortices with topological charges equal to ±1 and ±2 was investigated. It was shown that the focusing of optical vortices with circular polarization by a wide-aperture diffractive lens can produce an intensity distribution with the negative value of the longitudinal component of the Poynting vector.

Keywords:
Richards-Wolf formulae, FDTD-method, optical vortex, tractor beam.

Citation:
Stafeev SS, Nalimov AG. Longitudinal component of the Poynting vector of a tightly focused optical vortex with circular polarization. Computer Optics 2018; 42(2): 190-196. DOI: 10.18287/2412-6179-2018-42-2-190-196.

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