A team proposes bringing the idea of twistronics, the strategy that revolutionized graphene physics by stacking layers at a twist angle, into free space. Instead of piling up materials, the work suggests superimposing structured light beams to generate optical moiré patterns capable of creating topological superstructures, or "supertopologies", within the beam itself.

Twistronics was born from the discovery that two graphene sheets rotated at a magic angle of about 1.1° become superconducting. The key lies in the moiré pattern that appears when two nearly identical lattices are overlaid: a large-scale modulation that redefines the electronic properties of the system. The new approach transfers this principle to optics, where two light beams with suitable phase or polarization structure can interfere and generate an analogous moiré, without any material substrate.

The proposal opens the door to designing topological landscapes in free light at will. These supertopologies could be used to manipulate beams with robustness against perturbations, transport protected optical information, or simulate topological phases of condensed matter with an optical system far more controllable and accessible than a real crystal.

The work connects two fields that until now advanced separately: structured optics and topological band engineering in 2D materials. If the idea is realized in the laboratory, free light would become a tabletop platform for exploring complex topological phenomena without the limitations of sample fabrication.