13 April 2005 Generation, detection, and propagation of nano-acoustic waves in piezoelectric semiconductors (Invited Paper)
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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.
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Kung-Hsuan Lin, Kung-Hsuan Lin, Chia-Lung Hsieh, Chia-Lung Hsieh, Cheng-Ta Yu, Cheng-Ta Yu, Chang-Chi Pan, Chang-Chi Pan, Jen-Inn Chyi, Jen-Inn Chyi, Stacia K. Keller, Stacia K. Keller, Steven P. DenBaars, Steven P. DenBaars, Chi-Kuang Sun, Chi-Kuang Sun, } "Generation, detection, and propagation of nano-acoustic waves in piezoelectric semiconductors (Invited Paper)", Proc. SPIE 5725, Ultrafast Phenomena in Semiconductors and Nanostructure Materials IX, (13 April 2005); doi: 10.1117/12.587820; https://doi.org/10.1117/12.587820
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