Photonic quasicrystal of spin angular momentum

TL;DR

This paper introduces the first photonic quasicrystals formed by spin angular momentum, revealing unique spin-orbit coupling effects and dynamic control of spin textures with potential applications in optics and information systems.

Contribution

It presents a novel class of spin-based photonic quasicrystals, providing a theoretical framework and experimental demonstration of their formation and manipulability.

Findings

Demonstration of spin angular momentum-based photonic quasicrystals

Observation of phason-like discontinuous dynamics in spin textures

Potential applications in optical trapping and encryption

Abstract

Quasicrystals,characterized by long-range order without translational symmetry,have catalyzed transformative advances in various fields,including optics in terms of field quasicrystals.Here,we present the first demonstration of photonic quasicrystals formed by spin angular momentum, unveiling novel spin-orbit coupling effects absent in traditional field quasicrystals.A de Bruijn tiling like theoretical framework was built elucidating the formation mechanism of spin quasicrystals for diverse symmetries.Moreover,the configurations of these spin textures can be manipulated through the adjustments of the wavefronts,among which phason-like discontinuous dynamics is observed and quantitatively measured. Unlike optical quasicrystals shaped by electromagnetic fields,these spin-governed quasicrystals exhibit quasi-periodic properties of kinematic parameters,extending their potential applications to other physical systems. These findings hold promise for novel advancements in optical trapping,quasicrystal fabrication,and optical encryption systems.