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We propose an experimental technique based on all-electric measurements toretrieve the frequency response of a one-dimensional piezoelectric phononiccrystal plate, structured periodically with millimeter-scaled metallic stripson its two surfaces. The metallic electrodes, used for the excitation ofLamb-like guided modes in the plate, ensure at the same time control of theirdispersion by means of externally loaded electric circuits that offernon-destructive tunability in the frequency response of these structures. Ourresults, in very good agreement with finite-element numerical predictions,reveal interesting symmetry aspects that are employed to analyze the frequencyband structure of such crystals. More importantly, Lamb-like guided modesinteract with electric-resonant bands induced by inductance loads on the plate,whose form and symmetry are discussed and analyzed in depth, showingunprecedented dispersion characteristics.

Piezoelectric Phononic Plates: Retrieving the Frequency Band Structure via All-electric Experiments