Ultrasonic surface waves above rectangular-groove gratings

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  • Luc Kelders
    Laboratorium voor Akoestiek en Thermische Fysica, Katholieke Universiteit Leuven, Departement Natuurkunde, Celestijnenlaan 200D, 3001 Leuven, Belgium
  • Jean F. Allard
    Institut d’Acoustique et de Mécanique de l’Université du Maine, UMR CNRS 6613, avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France
  • Walter Lauriks
    Laboratorium voor Akoestiek en Thermische Fysica, Katholieke Universiteit Leuven, Departement Natuurkunde, Celestijnenlaan 200D, 3001 Leuven, Belgium

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<jats:p>A modal model, initially developed to modelize diffraction of electromagnetic waves by rectangular-groove gratings, is used to describe ultrasonic surface waves above the same structures in air. A simple analytical formulation which provides results comparable to the modal method is presented. Measurements performed on ultrasonic surface waves are compared to predictions obtained with the simplified formulation and the modal model.</jats:p>

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