Radiation of THz electromagnetic waves from oscillating exciton population in semiconductor microcavities

Summary form only given. Cavity-induced exciton-polaritons formed in high-Q semiconductor microcavities (SMCs) are attracting a lot of interest from viewpoints of fundamental physics and application. Since the electromagnetic wave (EMW) radiation is a result of optical rectification, a second order nonlinear process, it provides a direct information on the coherent dynamics of exciton population. In typical SMCs, frequency of the EMW, roughly given by the spectral polariton mode splitting /spl Omega//sub p/, is in THz range.