title: Planar modes free piezoelectric resonators using a phononic crystal with holes.
abstract: By using the principles behind phononic crystals, a periodic array of circular holes made along the polarization thickness direction of piezoceramic resonators are used to stop the planar resonances around the thickness mode band. In this way, a piezoceramic resonator adequate for operation in the thickness mode with an in phase vibration surface is obtained, independently of its lateral shape. Laser vibrometry, electric impedance tests and finite element models are used to corroborate the performances of different resonators made with this procedure. This method can be useful in power ultrasonic devices, physiotherapy and other external medical power ultrasound applications where piston-like vibration in a narrow band is required.
authors.affiliation: Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México, Apartado Postal 1-1010, Querétaro 76230, Mexico.
authors.forename: J L
authors.initials: JL
authors.lastname: Aragón
authors.affiliation: Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México, Apartado Postal 1-1010, Querétaro 76230, Mexico.
authors.forename: R
authors.initials: R
authors.lastname: Quintero-Torres
authors.affiliation: Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México, Apartado Postal 1-1010, Querétaro 76230, Mexico.
authors.forename: J L
authors.initials: JL
authors.lastname: Domínguez-Juárez
authors.affiliation: Instituto de Tecnologías Físicas y de la Información "Leonardo Torres Quevedo", Consejo Superior de Investigaciones Científicas, Serrano 144, 28006 Madrid, Spain.
authors.forename: E
authors.initials: E
authors.lastname: Iglesias
authors.affiliation: Instituto de Tecnologías Físicas y de la Información "Leonardo Torres Quevedo", Consejo Superior de Investigaciones Científicas, Serrano 144, 28006 Madrid, Spain.
authors.forename: S
authors.initials: S
authors.lastname: Ronda
authors.affiliation: Instituto de Tecnologías Físicas y de la Información "Leonardo Torres Quevedo", Consejo Superior de Investigaciones Científicas, Serrano 144, 28006 Madrid, Spain. Electronic address: francisco.montero@csic.es.
authors.forename: F
authors.initials: F
authors.lastname: Montero de Espinosa
keywords: Phononic crystals; Piezoelectric resonators; Piezoelectric transducers