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Proceedings Paper

Generation, detection, and propagation of nano-acoustic waves in piezoelectric semiconductors (Invited Paper)
Author(s): Kung-Hsuan Lin; Chia-Lung Hsieh; Cheng-Ta Yu; Chang-Chi Pan; Jen-Inn Chyi; Stacia K. Keller; Steven P. DenBaars; Chi-Kuang Sun
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Paper Abstract

Piezoelectric semiconductor with heterostructure can be treated as a piezoelectric transducer for the generation of acoustic waves with wavelength less than 10 nm (nano-acoustic waves) by optical technique. This optical piezoelectric transducer has also been utilized for the detection of the nano-acoustic waves (NAW). In this paper, we discuss the generation, detection, and propagation of nano-acoustic waves in piezoelectric semiconductors. We demonstrate that the acoustic frequency of the NAW can be tuned by an optical control technique. Besides, we have also developed an acoustic sensor with THz bandwidth which can be used to study NAW propagation control devices such as nano-phononic bandgap crystal. We demonstrated that the roughness of an interface can be evaluated by the NAW with a resolution less than 1 nm through the acoustic phasefront distortion effect. With the optical piezoelectric transducer, nano-ultrasonics, which is analogous to typical ultrasonics but on the nanometer scale, has been successfully developed.

Paper Details

Date Published: 13 April 2005
PDF: 9 pages
Proc. SPIE 5725, Ultrafast Phenomena in Semiconductors and Nanostructure Materials IX, (13 April 2005); doi: 10.1117/12.587820
Show Author Affiliations
Kung-Hsuan Lin, National Taiwan Univ. (Taiwan)
Chia-Lung Hsieh, National Taiwan Univ. (Taiwan)
Cheng-Ta Yu, National Taiwan Univ. (Taiwan)
Chang-Chi Pan, National Central Univ. (Taiwan)
Jen-Inn Chyi, National Central Univ. (Taiwan)
Stacia K. Keller, Univ. of California/Santa Barbara (United States)
Steven P. DenBaars, Univ. of California/Santa Barbara (United States)
Chi-Kuang Sun, National Taiwan Univ. (Taiwan)


Published in SPIE Proceedings Vol. 5725:
Ultrafast Phenomena in Semiconductors and Nanostructure Materials IX
Kong-Thon Tsen; Jin-Joo Song; Hongxing Jiang, Editor(s)

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