2003
DOI: 10.1134/1.1608986
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Acoustic properties of a dielectric with cavities in a polarizing electric field

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“…As a rule, the amplification effect due to the charge carrier drift current is observed in a thin boundary layer of the order of a wavelength. However, it was shown in [36] that amplified electroacoustic waves could have the character of volume propagation. A small difference from the spectrum of electroacoustic waves at the free boundary of the piezoelectric and a small propagation angle (several degrees from the surface of the piezoelectric) can allow this wave to be excited in the gap of two piezoelectrics, either with amplification or attenuation, changing the direction of the electric current in the semiconductor.…”
Section: Statement Of the Problemmentioning
confidence: 99%
“…As a rule, the amplification effect due to the charge carrier drift current is observed in a thin boundary layer of the order of a wavelength. However, it was shown in [36] that amplified electroacoustic waves could have the character of volume propagation. A small difference from the spectrum of electroacoustic waves at the free boundary of the piezoelectric and a small propagation angle (several degrees from the surface of the piezoelectric) can allow this wave to be excited in the gap of two piezoelectrics, either with amplification or attenuation, changing the direction of the electric current in the semiconductor.…”
Section: Statement Of the Problemmentioning
confidence: 99%