Picosecond acoustics in single quantum wells of cubic GaN/(Al,Ga)N

Czerniuk, T.; Ehrlich, T.; Wecker, T.; As, D.J.; Yakovlev, D.R.; Akimov, A.V.; Bayer, M.

Abstract

A 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.

Citation

Czerniuk, T., Ehrlich, T., Wecker, T., As, D., Yakovlev, D., Akimov, A., & Bayer, M. (2017). Picosecond acoustics in single quantum wells of cubic GaN/(Al,Ga)N. Physical Review Applied, 7(1), Article 014006. https://doi.org/10.1103/PhysRevApplied.7.014006

• Journal Article Type: Article
• Acceptance Date: Dec 14, 2016
• Publication Date: Jan 11, 2017
• Deposit Date: Mar 28, 2017
• Publicly Available Date: Mar 28, 2017
• Journal: Physical Review Applied
• Electronic ISSN: 2331-7019
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 7
• Issue: 1
• Article Number: 014006
• DOI: https://doi.org/10.1103/PhysRevApplied.7.014006
• Public URL: https://nottingham-repository.worktribe.com/output/840838
• Publisher URL: http://journals.aps.org/prapplied/abstract/10.1103/PhysRevApplied.7.014006