The tight focusing of laser radiation using 4-sector polarization converter

International Conference of Young Scientists and Specialists "Optics-2015"

Stafeev, S.S.^1,2 ; Nalimov, A.G.^1,2 ; O'Faolain, L.^3 ; Kotlyar, V.V.^1,2

Image Processing Systems Institute, Samara, Russia^1

Samara State Aerospace University, Samara, Russia^2

School of Physics and Astronomy, University of St. Andrews, United Kingdom^3

关键词: Focal spot;    Linearly polarized light;    Polarization converters;    Radial polarization;    Tight focusing;    Zone plates;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/735/1/012006/pdf
DOI  :  10.1088/1742-6596/735/1/012006

来源: IOP

【 摘 要 】

A laser beam with mixed linear-radial polarization formed by reflection of a linearly polarized light from a 4-sector micropolarizer was focused using a binary zone plate in a focal spot with diameters 0.35±0.02 and 0.38±0.02 of a wavelength.