Onset and Growth of the Electron-Hole Liquid Phase in Germanium

Abstract
Under fast optical excitation and with a fast detector we were able to resolve in time the onset and growth of the electron-hole liquid phase Ge. We found that the onset of luminescence was delayed by 35 nsec. Thereafter the luminescence increased to a quasisteady state with a time constant of 550 nsec and subsequently decayed with a 35-μsec time constant.