Researchers propose a novel mechanism for non-reciprocal optical devices without magnetic fields through nonlinear non-reciprocal susceptibility. They experimentally achieved self-induced isolation of optical signals, demonstrating high isolation ratio (63.4 dB), wide bandwidth (2.1 GHz), and low insertion loss (1 dB). The innovation enables passive isolation through asymmetry cavity, allowing a weak signal to control stronger backward laser. This advancement has implications for topological photonics and quantum information transfer.

Nanostructures with specific electromagnetic patterns promise applications in nanoelectronics and future information technologies. However, it is very challenging to control those patterns. Now, a team at HZB examined a specific class of nanoislands on silicon with interesting chiral, swirling polar textures, which can be stabilised and even reversibly switched by an external electric field.

A new study involving the UGR shows that deep generative vision models can synthesise highly realistic satellite images that can be used to illustrate future climate-related events such as floods, sea-ice retreat, and reforestation.