Exciton-polariton

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.

Microcavity exciton–polaritons inherit some properties from both of their roots, such as a light effective mass (from the photons) and a capacity to interact with each other (from the strong exciton nonlinearities) and with the environment (including the internal phonons, which provide thermalization, and the outcoupling by radiative losses).

[3] This was done in order to prove that exciton-polaritons propagate over several microns and that the interplay between the molecular disorder and long-range correlations induced by coherent mixing with light leads to a mobility transition between diffusive and ballistic transport.

Exciton-polaritons are composite bosons which can be observed to form Bose–Einstein condensates,[7][8][9][10] and sustain polariton superfluidity and quantum vortices[11] and are prospected for emerging technological applications.

[12] Many experimental works currently focus on polariton lasers,[13] optically addressed transistors,[14] nonlinear states such as solitons and shock waves, long-range coherence properties and phase transitions, quantum vortices and spinorial patterns.