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High topological charge lasing in quasicrystals.
Kristian Arjas1, Jani Matti Taskinen1, Rebecca Heilmann1
1Department of Applied Physics, Aalto University School of Science, Espoo, Finland.
Nature Communications
|November 5, 2024
Summary
Researchers achieved high-order topological charge lasing in quasicrystals, overcoming limitations of periodic lattices. This opens new avenues for advanced photonic devices and fundamental physics research.
Area of Science:
- Photonics and Optics
- Condensed Matter Physics
- Materials Science
Background:
- Photonic modes with polarization vortices possess topological charge.
- Lasing with high topological charges is limited in periodic lattices due to symmetry constraints.
Purpose of the Study:
- To experimentally demonstrate lasing with higher-order topological charges.
- To explore the potential of quasicrystals for advanced photonic applications.
Main Methods:
- Utilized quasicrystals with specific symmetries to support higher-order topological charges.
- Employed group theory to identify electromagnetic field nodes.
- Integrated lossy plasmonic nanoparticles at strategic positions to maximize optical gain.
Main Results:
- Successfully demonstrated lasing with topological charges up to +/-19 in quasicrystals.
- Observed intricate ordered structures in reciprocal space corresponding to increasing topological charges.
- Quasicrystal design enabled overcoming symmetry limitations of periodic lattices.
Conclusions:
- Quasicrystals provide a novel platform for achieving high-order topological charge lasing.
- This research paves the way for fundamental studies of topological defects and coherent light beams.
- Potential applications include omni-directional and flat-band-like lasing devices.
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