Journal
PHYSICAL REVIEW B
Volume 108, Issue 15, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.108.155144
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We present a scattering formalism for analyzing the spin-momentum locking in structured holey plasmonic metasurfaces. The emergence of spin-momentum locking is found to originate from the unit-cell configuration. Additionally, we identify several breakdown terms that spoil the perfect spin-momentum locking polarization. We also demonstrate that this breakdown is present in systems with global symmetries of translation and rotation.
We present a scattering formalism to analyze the spin-momentum locking in structured holey plasmonic metasurfaces. It is valid for any unit cell for arbitrary position and orientation of the holes. The spin-momentum locking emergence is found to originate from the unit-cell configuration. Additionally, we find that there are several breakdown terms spoiling the perfect spin-momentum locking polarization. We prove that this breakdown also appears in systems with global symmetries of translation and rotation of the whole lattice, like the kagome lattice. Finally, we present the excitation of surface-plasmon polaritons as the paramount example of the spin-momentum locking breakdown.
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