Tag: Topological Materials and Phenomena
Modulating unit cells changes topological phases in a photonic Lieb lattice
What the study found The study found that relaxing a specific spatial symmetry of the unit cell in a gyromagnetic photonic crystal can produce a hierarchy of topological phases. These include first-order Chern phases and second-order dipole and quadrupole phases, with both edge states and corner states appearing across different phases. Why the authors say…
Photonic experiment observes energy-band Riemann surface
Researchers experimentally observe energy-band Riemann surfaces in a non-Hermitian photonic system using synthetic frequency dimensions, revealing unified structure underlying topological physics.
