High topological charge lasing in quasicrystals

Abstract

Photonic modes exhibiting a polarization winding akin to a vortex possess an integer topological charge. Lasing with topological charge 1 or 2 can be realized in periodic lattices of up to six-fold rotational symmetry. Higher order charges require symmetries not compatible with any two-dimensional Bravais lattice. Here, we experimentally demonstrate lasing with topological charges as high as -5, +7, -17 and +19 in quasicrystals. We discover rich ordered structures of increasing topological charges in the reciprocal space. Our quasicrystal design utilizes group theory in determining electromagnetic field nodes, where lossy plasmonic nanoparticles are positioned to maximize gain. Our results open a new path for fundamental studies of higher-order topological defects, coherent light beams of high topological charge, and realizations of omni-directional, flat-band-like lasing.

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Cited by in corpus (6)

• Inherent spin-orbit locking in topological bound state in the continuum lasing
• Flat-Band Lasing in Silicon Waveguide-Integrated Metasurfaces
• Topological invariants and topological charges in photonic systems
• Breakdown of Bulk-Radiation Correspondence in Radiative Photonic Lattices
• Topological photonics in nanoscaled systems with far field radiation and polarization singularities
• Chiral Diffraction from Aperiodic Monotile Lattice