Intraband Rabi Oscillations Involving Photons and Acoustic Phonons

Probabilities W-erc of intraband electron transitions that involve the participation of photons and longitudinal acoustic phonons in a covalent crystal are determined. It is shown that, in the case of prebreak- down light intensities, specific electron-phonon Rabi oscillations with frequency Omega((eff))(R) can occur, with this frequency being affected by processes of higher orders in the field of the light wave. As in previously considered processes with the participation of optical phonons, light is absorbed only until time tau(1) to reach the first maximum in the dependence W-exc(t) where t is the time elapsed since the beginning of the laser pulse.