Surface Acoustic Wave induced Transport in a Double Quantum Dot
  We report on non-adiabatic transport through a double quantum dot under irradiation of surface acoustic waves generated on-chip. At low excitation powers, absorption and emission of single and multiple phonons is observed. At higher power, sequential phonon assisted tunneling processes excite the double dot in a highly non-equilibrium state. The present system is attractive for studying electron-phonon interaction with piezoelectric coupling. 
W.J.M. Naber, T. Fujisawa, H.W. Liu and W.G. van der Wiel