All-optical switch based on novel physics effects

All-optical switches are among the most important parts of integrated photonics. Ultrahigh speed and ultralow energy consumption two necessary indexes all-optical switches. Traditionally, based on concepts such as micro-ring resonators, surface plasmon polaritons, photonic crystals, metamaterials. However, platforms cannot satisfy demand for high performance To overcome limited response time consumption, recent studies have introduced new applications physics parity–time symmetry, exceptional points, topological insulators, bound states in a continuum. Such physical not only provide promising research avenues switch but also broaden design channel. This is expected to achieve ultracompact, ultrafast, high-capacity information processing.