title: Analysis of signals propagating in a phononic crystal PZT layer deposited on a silicon substrate.
abstract: The design of a stop-band filter constituted by a periodically patterned lead zirconate titanate (PZT) layer, polarized along its thickness, deposited on a silicon substrate and sandwiched between interdigitated electrodes for emission/reception of guided elastic waves, is investigated. The filter characteristics are theoretically evaluated by using finite element simulations: dispersion curves of a patterned PZT layer with a specific pattern geometry deposited on a silicon substrate present an absolute stop band. The whole structure is modeled with realistic conditions, including appropriate interdigitated electrodes to propagate a guided mode in the piezoelectric layer. A robust method for signal analysis based on the Gabor transform is applied to treat transmitted signals; extract attenuation, group delays, and wave number variations versus frequency; and identify stop-band filter characteristics.
authors.forename: Anne-Christine
authors.initials: AC
authors.lastname: Hladky-Hennion
authors.forename: Jérôme
authors.initials: J
authors.lastname: Vasseur
authors.forename: Bertrand
authors.initials: B
authors.lastname: Dubus
authors.forename: Bruno
authors.initials: B
authors.lastname: Morvan
authors.forename: Nicolas
authors.initials: N
authors.lastname: Wilkie-Chancellier
authors.forename: Loïc
authors.initials: L
authors.lastname: Martinez