Photonics

Photonics is the science and technology of generating and controlling photons, particularly in the visible and near infra-red light spectrum. The field of photonics has a strong interest in the use of photons to carry information. The science and applications of photonics are usually based on laser light. Polaritonics differs with photonics in that the fundamental information carrier is a phonon-polariton, which is an admixture of photons and phonons, and operates in the range of frequencies from 300 terahertz to approximately 10 terahertz. Photonics typically operates at frequencies on the order of hundreds of terahertz.

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Photon: In physics, the photon (from Greek φοτος, meaning light) is a quantum of the electromagnetic field, for instance light. Photons were originally called "energy quanta"....

Infra-red: Redirect infrared...

Light: Light is electromagnetic radiation with a wavelength that is visible to the eye (visible light) or, in a technical or scientific setting, electromagnetic radiation of any wavelength. The three basic dimensions of light (i.e., all electromagnetic radiation) are:...