High topological charge lasing in quasicrystals

• DOI: 10.48550/arxiv.2405.19980
• Publication Date: 2024-05-30
• Authors: Kristian Arjas; Jani M. Taskinen; Rebecca Heilmann; Grazia Salerno; Päivi Törmä
• Keywords: 0303 health sciences; 03 medical and health sciences; Condensed Matter - Mesoscale and Nanoscale Physics; Science; Q; Mesoscale and Nanoscale Physics (cond-mat.mes-hall); FOS: Physical sciences; Article; Physics - Optics; Optics (physics.optics)

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