Type
ArticleAuthors
Peng, PaiXiao, Bingmu
Wu, Ying

KAUST Department
Applied Mathematics and Computational Science ProgramComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Earth Science and Engineering Program
Graduate Affairs Operations
Waves in Complex Media Research Group
Date
2014-10Permanent link to this record
http://hdl.handle.net/10754/563781
Metadata
Show full item recordAbstract
We design a flat sub-wavelength lens that can focus acoustic wave. We analytically study the transmission through an acoustic grating with curled slits, which can serve as a material with tunable impedance and refractive index for acoustic waves. The effective parameters rely on the geometry of the slits and are independent of frequency. A flat acoustic focusing lens by such acoustic grating with gradient effective refractive index is designed. The focusing effect is clearly observed in simulations and well predicted by the theory. We demonstrate that despite the large impedance mismatch between the acoustic lens and the matrix, the intensity at the focal point is still high due to Fabry-Perot resonance.Citation
Peng, P., Xiao, B., & Wu, Y. (2014). Flat acoustic lens by acoustic grating with curled slits. Physics Letters A, 378(45), 3389–3392. doi:10.1016/j.physleta.2014.09.042Sponsors
This work was supported by the Baseline Research Fund of King Abdullah University of Science and Technology.Publisher
Elsevier BVJournal
Physics Letters Aae974a485f413a2113503eed53cd6c53
10.1016/j.physleta.2014.09.042