Picosecond acoustics in single quantum wells of cubic GaN/(Al,Ga)NTools Czerniuk, T., Ehrlich, T., Wecker, T., As, D.J., Yakovlev, D.R., Akimov, A.V. and Bayer, M. (2017) Picosecond acoustics in single quantum wells of cubic GaN/(Al,Ga)N. Physical Review Applied, 7 (1). 014006/1-014006/6. ISSN 2331-7019 Full text not available from this repository.AbstractA picosecond acoustic pulse is used to study the photoelastic interaction in single zinc-blende GaN/AlxGa1−xN quantum wells. We use an optical time-resolved pump-probe setup and demonstrate that tuning the photon energy to the quantum well’s lowest electron-hole transition makes the experiment sensitive to the quantum well only. Because of the small width, its temporal and spatial resolution allows us to track the few-picosecond-long transit of the acoustic pulse. We further deploy a model to analyze the unknown photoelastic coupling strength of the quantum well for different photon energies and find good agreement with the experiments.
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