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Piezoelectric response to coherent longitudinal and transverse acoustic phonons in a semiconductor Schottky diode

Srikanthreddy, D.; Glavin, B.A.; Poyser, Caroline Louise; Henini, M.; Lehmann, D.; Jasiukiewicz, Cz.; Akimov, Andrey V.; Kent, A.J.

Authors

D. Srikanthreddy

B.A. Glavin

Caroline Louise Poyser ppzcp@nottingham.ac.uk

M. Henini mohamed.henini@nottingham.ac.uk

D. Lehmann

Cz. Jasiukiewicz

Andrey V. Akimov

A.J. Kent anthony.kent@nottingham.ac.uk



Abstract

We study the generation of microwave electronic signals by pumping a (311) GaAs Schottky diode with compressive and shear acoustic phonons, generated by femtosecond optical excitation of an Al _lm transducer and mode conversion at the Al-GaAs interface. They propagate through the substrate and arrive at the Schottky device on the opposite surface, where they induce a microwave electronic signal. The arrival time, amplitude and polarity of the signals depend on the phonon mode. A theoretical analysis is made of the polarity of the experimental signals. This includes the piezoelectric and deformation potential mechanisms of electron-phonon interaction in a Schottky contact and shows that the piezoelectric mechanism is dominant for both transverse and longitudinal modes with frequencies below 250 GHz and 70 GHz respectively.

Journal Article Type Article
Journal Physical Review Applied
Electronic ISSN 2331-7019
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 7
Issue 2
Article Number 024014
APA6 Citation Srikanthreddy, D., Glavin, B., Poyser, C. L., Henini, M., Lehmann, D., Jasiukiewicz, C., …Kent, A. (in press). Piezoelectric response to coherent longitudinal and transverse acoustic phonons in a semiconductor Schottky diode. Physical Review Applied, 7(2), https://doi.org/10.1103/PhysRevApplied.7.024014
DOI https://doi.org/10.1103/PhysRevApplied.7.024014
Publisher URL http://journals.aps.org/prapplied/abstract/10.1103/PhysRevApplied.7.024014
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0





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