Side excitation of polaritonic molecules

In a DBR microcavity with quantum wells embedded, strong coupling between excitons inside the quantum wells with the microcavity photons results in a new particle called exciton polariton. These bosonic particles are partly light and partly matter, thus they can be seen as an effective nonlinearity for light. Because of their bosonic lightweight nature, stimulated scattering into a certain state occurs at cryogenic temperatures [1].