exciton polaritons

Exciton polaritons are hybrid particles formed when light (photons) interacts strongly with electronic excitations (excitons) in a material, typically in a semiconductor. This coupling creates new quasi-particles that combine properties of both light and matter—allowing them to move quickly like photons but also interact strongly with their environment like matter. They are useful for exploring quantum phenomena and developing advanced optoelectronic devices, such as low-threshold lasers and quantum information systems. Essentially, exciton polaritons are a bridge between light and matter, enabling new ways to control and manipulate energy and information at the quantum level.