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What is Tight Focusing of Radially Polarized Beams about?

This paper presents a numerical study on the tight focusing of radially polarized beams (RPB) using polarization-insensitive nanopillar metalenses, which offer a compact and cost-effective alternative to traditional objective lenses. The research demonstrates that RPB can achieve a smaller focal spot compared to linearly polarized beams due to its unique longitudinal component, with diffraction-limited focusing achieved through high numerical aperture designs. The findings suggest potential applications in

Author

2020phdph004

Language

EN