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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Yu-Ching Lee Wun-Bin Shih Yu-Wei Su Ching-Chung Yin |
| Copyright Year | 2007 |
| Description | Author affiliation: Nat. Chiao Tung Univ., Hsinchu (Yu-Ching Lee; Wun-Bin Shih; Yu-Wei Su; Ching-Chung Yin) |
| Abstract | This paper presents an experimental evidence to correlate the acousto-optic effect of nematic liquid crystals to modal excitations of guided acoustic waves. The optic axes of liquid crystal molecules in a cell can be tilted by ultrasound at oblique incidence. The cell filled with homeotropically aligned liquid crystal material, 5CB, is fully immersed in a water tank situated between two crossed polarizers. Multi-modal guided acoustic waves have been excited in cell by changing the angle of incidence and driving frequency. The liquid crystal material sandwiched between two glass plates is regarded as a Newtonian fluid and modeled to be an isotropic hypothetical solid. The phase velocity dispersion curves and associated modal strains within the liquid crystal cell are determined numerically. Comparison between measured data and prediction reveals that guided acoustic waves have influence on the acousto-optic response of liquid crystals rather than bulk acoustic waves. Simulated results show that homeotropically and homogeneously aligned liquid crystals can be affected by symmetric and antisymmetric modes, respectively. |
| Starting Page | 832 |
| Ending Page | 835 |
| File Size | 263778 |
| Page Count | 4 |
| File Format | |
| ISBN | 9781424413836 |
| ISSN | 10510117 |
| DOI | 10.1109/ULTSYM.2007.213 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2007-10-28 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Liquid crystals Acoustic waves Crystalline materials Acoustooptic effects Ultrasonic imaging Optical materials Optical polarization Frequency Glass Solid modeling |
| Content Type | Text |
| Resource Type | Article |
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