Optical piezoelectric transducer for nano-ultrasonics | |
K.-H. Li1; C.-T. Y1; T.-M. Liu1![]() | |
2005 | |
Source Publication | ieee transactions on ultrasonics, ferroelectrics, and frequency control
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ISSN | 0885-3010 |
Volume | 52Issue:8 |
Abstract | Piezoelectric semiconductor strained layers can be treated as piezoelectric transducers to generate nanometer-wavelength and THz-frequency acoustic waves. The mechanism of nano-acoustic wave (NAW) generation in strained piezoelectric layers, induced by femtosecond optical pulses, can be modeled by a macroscopic elastic continuum theory. The optical absorption change of the strained layers modulated by NAW through quantum-confined Franz-Keldysh (QCFK) effects allows optical detection of the propagating NAW. Based on these piezoelectric-based optical principles, we have designed an optical piezoelectric transducer (OPT) to generate NAW. The optically generated NAW is then applied to one-dimensional (1-D) ultrasonic scan for thickness measurement, which is the first step toward multidimensional nano-ultrasonic imaging. By launching a NAW pulse and resolving the returned acoustic echo signal with femtosecond optical pulses, the thickness of the studied layer can be measured with 1 nm resolution. This nano-structured OPT technique will provide the key toward the realization of nano-ultrasonics, which is analogous to the typical ultrasonic techniques but in a nanometer scale |
DOI | http://dx.doi.org/10.1109/TUFFC.2005.1509800 |
Indexed By | SCI |
Language | 英语 |
WOS Research Area | Acoustics ; Engineering |
WOS Subject | Acoustics ; Engineering, Electrical & Electronic |
WOS ID | WOS:000231636700022 |
Fulltext Access | |
Citation statistics | |
Document Type | Journal article |
Collection | Faculty of Health Sciences |
Affiliation | 1.Graduate Institute of Electro-Optical Engineering, National Taiwan University, Taipei 10617, Taiwan 2.Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218 3.Department of Electrical Engineering, National Central University, Chung-Li 32045, Taiwan 4.Department of Electrical Engineer4 |
Recommended Citation GB/T 7714 | K.-H. Li,C.-T. Y,T.-M. Liu,et al. Optical piezoelectric transducer for nano-ultrasonics[J]. ieee transactions on ultrasonics, ferroelectrics, and frequency control,2005,52(8). |
APA | K.-H. Li.,C.-T. Y.,T.-M. Liu.,G.-W. Cher.,G.-T. Che.,...&C.-K. Su.(2005).Optical piezoelectric transducer for nano-ultrasonics.ieee transactions on ultrasonics, ferroelectrics, and frequency control,52(8). |
MLA | K.-H. Li,et al."Optical piezoelectric transducer for nano-ultrasonics".ieee transactions on ultrasonics, ferroelectrics, and frequency control 52.8(2005). |
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