Meron Spin Textures in Momentum Space Spawning from Bound States in the Continuum
arXiv:2505.15081 · doi:10.1103/3g3j-mnh9
Abstract
Topological spin textures, such as merons and skyrmions, have shown significance in both fundamental science and practical applications across diverse physical systems. The optical skyrmionic textures in real space have been extensively explored, but which in momentum space are still rarely studied. Here, we report the experimental generation of momentum-space meron spin textures via bound states in the continuum (BICs) in photonic crystal slabs. We show that under circularly polarized illumination, the momentum-space vortex topology of BICs can transform light with meron spin textures in momentum space. These merons exhibit polarity-switchable configurations controlled by incident light polarization. We theoretically and experimentally verify the generation of momentum-space merons and demonstrate their operational flexibility across a broad spectral range. Our results establish a connection between different momentum-space topologies and provide a robust and compact platform for generating topological spin textures.
arXiv comment4 figures
References in corpus (21)
- Advances in the Physics of Magnetic Skyrmions and Perspective for Technology
- Resonantly Trapped Bound State in the Continuum Laser
- Topological nature of bound states in the radiation continuum
- Generating optical vortex beams by momentum-space polarization vortices centered at bound states in the continuum
- Optical skyrmions in evanescent electromagnetic fields
- Applications of Bound States in the Continuum in Photonics
- Deep-subwavelength features of photonic skyrmions in a confined electromagnetic field with orbital angular momentum
- Skyrmion-electronics: Writing, deleting, reading and processing magnetic skyrmions toward spintronic applications
- Optical skyrmions and other topological quasiparticles of light
- Observation of optical vortices in momentum space
- Generation of tunable optical skyrmions on Skyrme-Poincaré sphere
- Paraxial Skyrmionic beams
- Polariton Bose-Einstein condensate from a Bound State in the Continuum
- Supertoroidal light pulses: Propagating electromagnetic skyrmions in free space
- Observation of Toroidal Pulses of Light
- Optically controlling the emission chirality of microlasers
- Photonic spin lattices: symmetry constraints for skyrmion and meron topologies
- Meron Spin Textures in Momentum Space
- Free-Space Propagation and Skyrmion Topology of Toroidal Electromagnetic Pulses
- Reconfigurable quantum fluid molecules of bound states in the continuum
- Spatio-temporal topology of plasmonic spin meron pairs revealed by polarimetric photo-emission microscopy