TITLE

Generation of picosecond acoustic pulses using a p-n junction with piezoelectric effects

AUTHOR(S)
Kung-Hsuan Lin; Cheng-Ta Yu; Yu-Chieh Wen; Chi-Kuang Sun
PUB. DATE
February 2005
SOURCE
Applied Physics Letters;2/28/2005, Vol. 86 Issue 9, p093110
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We demonstrate the generation of picosecond acoustic pulses using a piezoelectric-semiconductor-based p-n junction structure. This p-n junction picosecond ultrasonic experiment confirms that the piezoelectric effect dominates the thermal expansion and deformation-potential coupling in the generation of picosecond acoustic pulses. The characteristics of the p-n initiated acoustic pulses are determined by the width and the field strength inside the depletion region. Our study indicates the future possibility to electrically control the acoustic pulse characteristics if we could apply an external bias to modulate the depletion region width.
ACCESSION #
16581398

 

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