Scientific and technological developments in photonics will have a major influence on lots of industries over the next ten to fifteen years. In this highly evolving field, the long-term competitiveness of companies, and especially of Small and Medium sized Enterprises (SMEs), mainly depends on their ability to offer a good product and to establish a successful market position, which is well connected to the management of the hidden potential in existing technological capabilities. Technology roadmaps are interesting tools used to portray the structural and temporal relationships among science, technology and applications and thus help in the decision-making process to remain successful on the market. The present roadmap aims at identifying technological trends for new photonic devices and nanophotonic materials, mainly in terms of market development. It has the main objective to inform SMEs about new scientific discoveries and developments in photonics and their related problem-solving potential for future products and applications in the Safety & Security sector. This roadmap is part of a set of four roadmaps about the use of photonic technologies in the industrial sectors of ICT, Heath & Well-being, Environment & Energy and Safety & Security. They were developed in the course of the European project PhotonicRoadSME. Altogether, these roadmaps will contribute to support SMEs in their strategic planning for future applications and products.