Abstract:
:We demonstrate that the propagation path of a surface acoustic wave (SAW), excited with an interdigitated transducer (IDT), can be visualized using a thin liquid film dispensed onto a lithium niobate (LiNbO3) substrate. The practical advantages of this visualization method are its rapid and simple implementation, with many potential applications including in characterising acoustic pumping within microfluidic channels. It also enables low-cost characterisation of IDT designs thereby allowing the determination of anisotropy and orientation of the piezoelectric substrate without the requirement for sophisticated and expensive equipment. Here, we show that the optical visibility of the sound path critically depends on the physical properties of the liquid film and identify heptane and methanol as most contrast rich solvents for visualization of SAW. We also provide a detailed theoretical description of this effect.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Rambach RW,Taiber J,Scheck CM,Meyer C,Reboud J,Cooper JM,Franke Tdoi
10.1038/srep21980subject
Has Abstractpub_date
2016-02-26 00:00:00pages
21980issn
2045-2322pii
srep21980journal_volume
6pub_type
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