Abstract
Several experimental and theoretical procedures have been used to get the Bose
Einstein Condensation (BEC) of polaritons. Nowadays, the investigation of the BEC of
polaritons is vastly popular and increasing attention in atomic as well as solid-state physics
because it has many technological applications. In this chapter, different experimental
procedures, excitation, and observation methods are explained. Recent research developments
in this field and the application of the BEC also are discussed.