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AssigneeMassachusetts Institute of Technology
InventorsCheong Yang Koh, Daniel Alcazar Jorba, Edwin Lorimer Thomas
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A methodology for designing structured metamaterials that can reflect, absorb and focus the propagation of both scalar acoustic and vector elastic waves is described. Three exemplary representative inventions based on the disclosed invention are described, illustrating i) compact ultra-wide broadband isolation, ii) sub-wavelength gaps and negative index propagation utilizing a single material platform, and iii) a fundamentally new method of producing multiple high frequency spectral gaps. Such metamaterial designs possess a wide range of potential applications, ranging from but not limited to, isolating an entity from external mechanical or acoustical vibrations, compact focusing lenses as well as cascaded high frequency filters for wave shaping and nonlinear wave propagation control.
Phononic metamaterial device including an array comprising a periodic array of repeated unit cells forming a lattice, with the design of the unit cell determined by a lattice net, wherein the size and geometric shape of a building blocks, the orientation and size of mechanical connections that for the mechanical topology of the lattice are selected to provide specific dispersion relations for elastic and acoustic wave propagation in the phononic metamaterials.
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