This paper proposes an on-chip plasmonic spin-Hall nanograting structure for simultaneous detection of polarization and phase singularities in cylindrical vortex vector beams (CWBs). The symmetry-breaking nanograting, with different periods in its upper and lower parts, enables unidirectional surface plasmon polariton (SPP) excitation based on the incident beam's topological charge. Integrated spin-Hall meta-slits provide chiral response for polarization detection. Theoretical and experimental results demonstrate the structure's ability to fully discriminate both topological charges and polarization states, showcasing its potential for compact integrated photonic circuits.
Publisher
Light: Science & Applications
Published On
Jan 01, 2020
Authors
Fu Feng, Guangyuan Si, Changjun Min, Xiaocong Yuan, Michael Somekh
Tags
plasmonic structure
spin-Hall effect
cylindrical vortex beams
polarization detection
topological charge
integrated photonics
surface plasmon polaritons
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