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SUMMARY:Beyond-Nearest-Neighbour Metamaterials - Gregory Chaplain (Univers
 ity of Exeter)
DTSTART:20230518T123000Z
DTEND:20230518T140000Z
UID:TALK199270@talks.cam.ac.uk
DESCRIPTION:Co Authors: Timothy A. Starkey\, Daniel B. Moore\, Ian R. Hoop
 er\, J. R. Sambles\, Alastair P. Hibbins\nAbstract:&nbsp\;\nEngineering th
 e dispersion of acoustic or elastic waves using coupling terms that spatia
 lly reach beyond the immediate local environment\, or unit cell\, is an &l
 squo\;emerging topic&rsquo\; in metamaterial design. In this talk\, we pre
 sent the background and motivations of this 'new trend' along with experim
 ental studies in acoustic and elastic systems that realise beyond-nearest-
 neighbour coupling to introduce dispersion relations with extrema within t
 he first Brillouin zone. In acoustics\, we use mixed waveguide-surface wav
 e coupling\, whilst in elastics we develop an elastic scaffold (with a rec
 ognisable popular British construction kit)\, with reconfigurable coupling
  elements and demonstrate the effects of structural symmetries on these ex
 otic dispersion relations.
LOCATION:Seminar Room 2\, Newton Institute
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