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dc.contributor.authorMazilu, Michael
dc.contributor.authorDemčenko, Andriejus
dc.contributor.authorWilson, Rab
dc.contributor.authorReboud, Julien
dc.contributor.authorCooper, Jonathan
dc.identifier.citationMazilu , M , Demčenko , A , Wilson , R , Reboud , J & Cooper , J 2018 , ' Breaking the symmetry of momentum conservation using evanescent acoustic fields ' , Physical Review Letters , vol. 121 , no. 24 , 244301 .
dc.identifier.otherPURE: 256459099
dc.identifier.otherPURE UUID: 53ea93cf-50ab-4245-b975-55f24e4c68c4
dc.identifier.otherScopus: 85059143672
dc.identifier.otherWOS: 000453476900012
dc.description.abstractAlthough the conservation of momentum is a fundamental law in physics, its constraints are not fulfilled for wave propagation at material boundaries, where incident waves give rise to evanescent field distributions. Whilst non-linear susceptibility tensor terms can provide solutions in the optical regime, this framework cannot be applied directly to acoustic waves. Now by considering a complete representation of wave interactions and scattering at boundaries, we are able to show a generic formalism of sum-frequency mixing for the whole scattering field including all evanescent waves. This general case was studied analytically and verified both numerically and experimentally, showing that considering evanescent waves leads to an anomalous non-linear interaction which enhances sum-frequency generation. This new interpretation not only provides a deeper understanding of the momentum conservation laws in acoustics but also promises translation of this new understanding into optics and photonics, to enhance non-linear interactions.
dc.relation.ispartofPhysical Review Lettersen
dc.rights© 2018, the Author(s). Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.en
dc.subjectQC Physicsen
dc.subjectTK Electrical engineering. Electronics Nuclear engineeringen
dc.titleBreaking the symmetry of momentum conservation using evanescent acoustic fieldsen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.School of Physics and Astronomyen
dc.description.statusPeer revieweden

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