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- W3204284935 abstract "The control of the propagation of elastic waves relies mainly on the design of artificial medium based on structured materials to obtain an advanced engineering of the dispersion of the propagation. During the thesis, the dispersion of the shear horizontal polarised guided mode (Love mode) in the bi-layer SiO2/Quartz (90ST-cut) structure was numerically investigated and the resulting applications explored. The properties of phononic crystals (PnCs) based on micro-machined holes in the SiO2 layer, and the interaction of this mode with pillars deposited on the surface of this guiding layer, have been studied. In the case of holey PnCs we have shown that it is possible to open band gaps, this property has been exploited for the design of a cavity resonator. The performances of this resonator are studied according to the geometrical parameters characterizing it. It is also proposed to study the interaction of the cavity resonator’s modes with the resonant modes of pillars deposited on the surface of the cavity. This has the effect of a better confinement of the modes and thus a drastic improvement of the quality factor. We also investigated the interaction between the Love mode and metasurfaces based on pillars deposited on the surface of SiO2. The couplings between pillars of identical or not geometries gave rise to various phenomena like acoustic analogue of Autler-Townes Splitting, Fabry-Perot resonance, acoustically induced transparency and Fano resonance. The results presented in this study could be used for potential applications such as signal processing, wave control, metamaterials and biosensors." @default.
- W3204284935 created "2021-10-11" @default.
- W3204284935 creator A5042830817 @default.
- W3204284935 date "2019-07-12" @default.
- W3204284935 modified "2023-09-27" @default.
- W3204284935 title "Artificial micro-nano structured materials based phononic crystals for Love waves manipulation" @default.
- W3204284935 hasPublicationYear "2019" @default.
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