Roadmap on topological photonics

Abstract Topological photonics seeks to control the behaviour of light through design protected topological modes in photonic structures. While this approach originated from studying electrons solid-state materials, it has since blossomed into a field that is at very forefront search for new types matter. This can have real implications future technologies by harnessing robustness applications devices. roadmap surveys some main emerging areas research within photonics, with special attention questions fundamental science, which an ideal position address. Each section provides overview current and challenges part field, highlighting most exciting opportunities developments.