High topological charge lasing in quasicrystals
Fuente:
arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866912531665125376 |
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| author | Arjas, Kristian Taskinen, Jani M. Heilmann, Rebecca Salerno, Grazia Törmä, Päivi |
| author_facet | Arjas, Kristian Taskinen, Jani M. Heilmann, Rebecca Salerno, Grazia Törmä, Päivi |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_19980 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | High topological charge lasing in quasicrystals Arjas, Kristian Taskinen, Jani M. Heilmann, Rebecca Salerno, Grazia Törmä, Päivi Optics Mesoscale and Nanoscale Physics 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. |
| title | High topological charge lasing in quasicrystals |
| topic | Optics Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2405.19980 |