Roadmap on chalcogenide photonics

Abstract Alloys of sulfur, selenium and tellurium, often referred to as chalcogenide semiconductors, offer a highly versatile, compositionally-controllable material platform for variety passive active photonic applications. They are optically nonlinear, photoconductive materials with wide transmission windows that present various high- low-index dielectric, low-epsilon plasmonic properties across ultra-violet, visible infrared frequencies, in addition an, non-volatile, electrically/optically induced switching capability between phase states markedly different electromagnetic properties. This roadmap collection presents an in-depth account the critical role semiconductors play within traditional emerging technology platforms. The potential this field going forward is demonstrated by presenting context outlook on selected socio-economically important research streams utilizing semiconductors. To end, encompasses topics range from systematic design kinetics device-level nanostructuring integration system architectures.