In physics, the exciton–polariton is a type of polariton; a hybrid light and matter quasiparticle arising from the strong coupling of the electromagnetic dipolar oscillations of excitons (either in bulk or quantum wells) and photons.[1] Because light excitations are observed classically as photons, which are massless particles, they do not therefore have mass, like a physical particle. This property makes them a quasiparticle.
- ^ S.I. Pekar (1958). "Theory of electromagnetic waves in a crystal with excitons". Journal of Physics and Chemistry of Solids. 5 (1–2): 11–22. Bibcode:1958JPCS....5...11P. doi:10.1016/0022-3697(58)90127-6.