Please use this identifier to cite or link to this item: https://doi.org/10.1088/1367-2630/ab4330
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dc.titlePhonon quarters-wave loss
dc.contributor.authorXiong, G.
dc.contributor.authorYu, Z.
dc.contributor.authorWang, J.-S.
dc.contributor.authorZhang, L.
dc.date.accessioned2022-01-07T03:51:04Z
dc.date.available2022-01-07T03:51:04Z
dc.date.issued2019
dc.identifier.citationXiong, G., Yu, Z., Wang, J.-S., Zhang, L. (2019). Phonon quarters-wave loss. New Journal of Physics 21 (9) : 93046. ScholarBank@NUS Repository. https://doi.org/10.1088/1367-2630/ab4330
dc.identifier.issn1367-2630
dc.identifier.urihttps://scholarbank.nus.edu.sg/handle/10635/213254
dc.description.abstractThere has been a growing interest in the phase of phonon, due to the theoretical prediction (Phys. Rev. Lett. 115.11 (2015)) and the experimental observation (Science 359.6379 (2018)) of chiral phonons, which have different phases in different components. While half-wave loss is a well-known concept in optics, in this work, a series of plateaus of quarters-wave loss are first found for the reflected phonon across an interface by using an atomic junction model. These plateaus can be understood by the S-matrix in the system with time-reversal symmetry. If a phonon wave propagates from a low acoustic-impedance material (or a low cutoff frequency material) to a higher one in the long-wave limit (or in the high frequency limit), a half-wave loss takes place for the reflected phonon; however, the plateau of half-wave loss for reflected phonon occurs in the whole frequency domain if phonon transfers to a material with a larger spring constant. Besides the half-wave loss, we also observe plateaus of quarter-wave (three-quarters-wave) loss in long wave limit when the two leads with identical acoustic impedance are coupled by a weak (strong) coupling in comparison with the optimum thermal coupling. The quarters-wave loss for phonons can be applied to chiral phonon manipulation and other phononics devices. © 2019 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft.
dc.publisherInstitute of Physics Publishing
dc.rightsAttribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.sourceScopus OA2019
dc.subjectChiral phonon
dc.subjectPhonon transport
dc.subjectReflected wave
dc.typeArticle
dc.contributor.departmentDEPT OF PHYSICS
dc.description.doi10.1088/1367-2630/ab4330
dc.description.sourcetitleNew Journal of Physics
dc.description.volume21
dc.description.issue9
dc.description.page93046
dc.published.statePublished
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