Effect of Acoustoelectric Interactions on the Electrical Impedance of a CdS Bar
The effect of acoustoelectric interactions on the electrical impedance of a piezoelectric semiconductor (CdS) bar is analyzed. With the assumption that the acoustic damping is dominated by the electronic effects, the impedance undergoes substantial changes whenever the bar dimensions approach odd mu...
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| Published in: | The Journal of the Acoustical Society of America Vol. 39; no. 5A; pp. 960 - 964 |
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| Main Authors: | , |
| Format: | Journal Article |
| Language: | English |
| Published: |
01-01-1966
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| Online Access: | Get full text |
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| Summary: | The effect of acoustoelectric interactions on the electrical impedance of a piezoelectric semiconductor (CdS) bar is analyzed. With the assumption that the acoustic damping is dominated by the electronic effects, the impedance undergoes substantial changes whenever the bar dimensions approach odd multiples of a half-wavelength of sound. In the presence of a biasing drift field, the impedance behavior is drastically modified and, under conditions of acoustic amplification, the real part of the impedance becomes negative for some frequencies in the neighborhood of the mechanical resonances. A linear theory for this effect is presented and the magnitude of the impedance changes are illustrated by calculations for a (1-cm) bar of CdS. |
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| ISSN: | 0001-4966 1520-8524 |
| DOI: | 10.1121/1.1909978 |