Controlled generation and imaging application of Poincaré sphere beams via all-dielectric metasurface

Abstract

Single-layer all-dielectric metasurface has attracted increasing attention in the generation and applications of higher-order and hybrid-order Poincaré sphere (HOPS and HyOPS) beams because of its powerful ability of manipulating the amplitude, phase, and polarization. However, there is not a unified theoretical frame to design all-dielectric metasurfaces for controlled generating unfocused and focused HOPS and HyOPS beams. Moreover, the controlled generation of focused HyOPS beams has not been demonstrated in imaging applications. Here, we will present a unified design method of the all-dielectric metasurfaces so that arbitrary vector vortex beams on a HOPS or HyOPS can be controlled generated and highly focused with a numerical aperture (NA). Then, we will demonstrate some metasurface samples which can generate and tightly focus the 5th-order HOPS beams and 0-1-order HyOPS beams with a NA of 0.89. Finally, a high-magnification (58X) and subwavelength-resolution (0.7λ) microscope will be demonstrated by utilizing the 0-1-order HyOPS beams sample as an objective lens. Benefiting from the tunability of the topological charge carried by the focal field, the imaging mode of the microscope can be tune from bright field mode to edge-enhancement mode.

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Identifiers

ORCID for Chuang Sun: orcid.org/0000-0001-7024-1916

ORCID for Kian Shen Kiang: orcid.org/0000-0002-7326-909X

ORCID for Jun-Yu Ou: orcid.org/0000-0001-8028-6130

ORCID for Jize Yan: orcid.org/0000-0002-2886-2847

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