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.
Caroline Louise Poyser firstname.lastname@example.org
M. Henini email@example.com
Andrey V. Akimov
A.J. Kent firstname.lastname@example.org
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|
|Publisher||American Physical Society|
|Peer Reviewed||Peer Reviewed|
|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|
|Copyright Statement||Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0|
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0
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