Piezoelectric Response to Coherent Longitudinal and Transverse Acoustic Phonons in a Semiconductor Schottky Diode
| Autor: | Caroline L. Poyser, Cz. Jasiukiewicz, Anthony J. Kent, D. Lehmann, D. Srikanthreddy, Mohamed Henini, A. V. Akimov, B. A. Glavin |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Phonon business.industry Schottky barrier General Physics and Astronomy Schottky diode 02 engineering and technology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 021001 nanoscience & nanotechnology 01 natural sciences Signal Piezoelectricity Condensed Matter::Materials Science Transducer 0103 physical sciences Femtosecond Optoelectronics 010306 general physics 0210 nano-technology business Microwave |
| Zdroj: | Physical Review Applied. 7 |
| ISSN: | 2331-7019 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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