Photonics is a branch of optics that involves the application of generation, detection, and manipulation of light in the form of photons through emission, transmission, modulation, signal processing, switching, amplification, and sensing
. It is the science and technological application of light particles, or photons, and can also describe the study of any other radiant energy whose quantum is a photon
. Photonics is closely related to quantum optics, and it focuses on the generation, detection, transmission, and manipulation of light in situations where its particle (photon) nature is essential
. This field has diverse applications, including optical telecommunications, laser manufacturing, biological and chemical sensing, medical diagnostics and therapy, display technology, and optical computing
