Electromechanical Conversion Efficiency of Biased Semiconductor Transducers
| Autor: | E. L. Adler |
|---|---|
| Rok vydání: | 1968 |
| Předmět: |
Electromechanical coupling coefficient
Mechanical load Materials science genetic structures Acoustics and Ultrasonics business.industry Acoustics Energy conversion efficiency Linear system Piezoelectricity Semiconductor Transducer Arts and Humanities (miscellaneous) Supersonic speed sense organs business |
| Zdroj: | The Journal of the Acoustical Society of America. 43:842-846 |
| ISSN: | 0001-4966 |
| DOI: | 10.1121/1.1910905 |
| Popis: | The effect of drifting carriers on the electromechanical‐conversion efficiency of a thin‐film piezoelectric transducer deposited onto a delay rod is analyzed. When the acoustic loss in the transducer is due to the carriers only, significant improvement in the efficiency occurs near the half‐wavelength or quarter‐wavelength frequencies of the transducer, depending on whether the mechanical load presented by the delay rod is small or large. For supersonic carrier velocities, electromechanical‐conversion gain is obtained near the mechanical resonances. A linear theory based on the acoustic‐amplification mechanism is outlined and the extent of this electromechanical amplification illustrated by computations for a 2‐μ‐thick ZnO film. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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