Ferroelectric topology in nanomembranes enables light field manipulation, relevant to furthering optics/ communication technologies

https://phys.org/news/2025-05-ferroelectric-topology-nanomembranes-enables-field.html

"ferroelectric polar topology sizes not aligned with that of laser light modes, overcome with μm-scale center-convergent ferroelectric topology using thin/ planar bilayer barium titanate membranes, enabling precise spatial vortex light field generation/ manipulation... leveraging ferroelectric polarization textures (topology) in freestanding oxide membranes... releasing from substrate, strain relaxation drives 2D (planar)-to-3D (dome-shaped) transformation, inducing symmetry-breaking polarization ordering... high-density storage"

Related: Study shows domain walls in ferroelectrics can be the most stable state, enabling high-density memory

https://phys.org/news/2025-05-domain-walls-ferroelectrics-stable-state.html