S
Sylvain Ballandras
Researcher at Franche Comté Électronique Mécanique Thermique et Optique Sciences et Technologies
Publications - 198
Citations - 2337
Sylvain Ballandras is an academic researcher from Franche Comté Électronique Mécanique Thermique et Optique Sciences et Technologies. The author has contributed to research in topics: Surface acoustic wave & Resonator. The author has an hindex of 23, co-authored 193 publications receiving 2209 citations. Previous affiliations of Sylvain Ballandras include University of Franche-Comté.
Papers
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Trapping and guiding of acoustic waves by defect modes in a full-band-gap ultrasonic crystal
Abdelkrim Khelif,Abdelkrim Choujaa,Bahram Djafari-Rouhani,M. Wilm,Sylvain Ballandras,Vincent Laude +5 more
TL;DR: In this paper, the authors report on the experimental observation of the existence and the interaction of localized defect modes in a full acoustic band gap in a two-dimensional lattice of steel cylinders immersed in water.
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Stable scattering-matrix method for surface acoustic waves in piezoelectric multilayers
TL;DR: In this paper, a scattering matrix approach is proposed to avoid numerical instabilities arising with the classical transfer matrix method when analyzing the propagation of plane surface acoustic waves in piezoelectric multilayers.
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High-frequency surface acoustic wave device based on thin-film piezoelectric interdigital transducers
A. K. Sarin Kumar,Patrycja Paruch,Jean-Marc Triscone,William Daniau,Sylvain Ballandras,Luca Pellegrino,Daniele Marré,Thomas Tybell +7 more
TL;DR: In this article, a nonconventional thin-film surface acoustic wave device based on periodic piezoelectric transducers was realized, consisting of a series of ferroelectric domains with alternating polarization states.
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Surface acoustic wave trapping in a periodic array of mechanical resonators
TL;DR: In this paper, the existence of two families of surface acoustic modes trapped by steep ridges on a piezoelectric substrate, shear horizontal and vertically polarized surface modes, is demonstrated experimentally using high aspect ratio interdigital transducers fabricated on lithium niobate.
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Simulations of surface acoustic wave devices built on stratified media using a mixed finite element/boundary integral formulation
Sylvain Ballandras,Alexandre Reinhardt,Vincent Laude,Abdelaziz Soufyane,S. Camou,William Daniau,T. Pastureaud,W. Steichen,R. Lardat,Marc Solal,P. Ventura +10 more
TL;DR: In this paper, a mixed formulation combining finite element analysis with a boundary integral method is proposed to accurately simulate the capability of massive periodic interdigital transducers to excite and detect guided acoustic waves in layered media.