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aip.orgtrue10.1063/1.49916842017-07-06Phononic crystal Luneburg lens for omnidirectional elastic wave focusing and energy harvesting
10.1063/1.4991684http://dx.doi.org/10.1063/1.4991684
doi:10.1063/1.4991684Phononic crystal Luneburg lens for omnidirectional elastic wave focusing and energy harvestingS. TolF. L. DegertekinA. Erturkenergy harvestingfinite element analysislensesoptical focusingphononic crystalspiezoelectric transducersrefractive indexsurface acoustic waves
2017-07-06trueaip.org10.1063/1.4991684
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