ACOUSTIC-PHONON MODULATION OF THE ELECTRON RESPONSE IN TUNNEL-COUPLEDQUANTUM-WELLS

Modulation of the electron properties of tunnel-coupled double quantum wells by acoustic phonon pumping is considered. Phonon-induced voltag e (or induced dipole moment) and phonon-drag effect are calculated for the case of high-energy phonon excitation. Linear electron response, with respect to the phonon-pumping intensity, is studied taking into a ccount intrawell and interwell scattering processes due to interface r oughness. From numerical estimations we obtained a phonon-induced drop in the potential on the order of 0.1-0.01 meV and a characteristic dr ag velocity on the order of 100 cm/s for a nonequilibrium phonon tempe rature equal to 20 K. The possible applications of such structures are noted.