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

Srikanthreddy, D. and Glavin, B.A. and Poyser, Caroline Louise and Henini, M. and Lehmann, D. and Jasiukiewicz, Cz. and Akimov, Andrey V. and Kent, A.J. (2017) Piezoelectric response to coherent longitudinal and transverse acoustic phonons in a semiconductor Schottky diode. Physical Review Applied, 7 (2). 024014/1-024014/6. ISSN 2331-7019

[img]
Preview
PDF - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Available under Licence Creative Commons Attribution.
Download (906kB) | Preview

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.

Item Type: Article
Schools/Departments: University of Nottingham, UK > Faculty of Science > School of Physics and Astronomy
Identification Number: https://doi.org/10.1103/PhysRevApplied.7.024014
Depositing User: Eprints, Support
Date Deposited: 17 Jan 2017 11:52
Last Modified: 18 Feb 2017 17:15
URI: http://eprints.nottingham.ac.uk/id/eprint/39905

Actions (Archive Staff Only)

Edit View Edit View