Výsledky vyhledávání - "J. E. Lefebvre"

Akademický článek

Mapped orthogonal functions method applied to acoustic waves-based devices

Autor: J. E. Lefebvre, J. G. Yu, F. E. Ratolojanahary, L. Elmaimouni, W. J. Xu, T. Gryba

Publikováno v: AIP Advances, Vol 6, Iss 6, Pp 065307-065307-18 (2016)

This work presents the modelling of acoustic wave-based devices of various geometries through a mapped orthogonal functions method. A specificity of the method, namely the automatic incorporation of boundary conditions into equations of motion throug

Externí odkaz: https://doaj.org/article/38fad318e4e343bca849060d7e8acbad

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Modeling of Rosen-type piezoelectric transformer by mean of a polynomial approach

Autor: D. J. Falimiaramanana, P. M. Rabotovao, M. Rguiti, I. Naciri, L. Elmaimouni, J. E. Lefebvre, F. E. Ratolojanahary, T. Gryba

Publikováno v: 6th International Conference on Multimedia Computing and Systems (ICMCS 2018)
6th International Conference on Multimedia Computing and Systems (ICMCS 2018), May 2018, Rabat, Morocco. pp.143-148, ⟨10.1109/ICMCS.2018.8525914⟩
ICMCS

International audience; The electromechanical behavior of piezoelectric transformers (PTs) is predicted using a polynomial approach. It is the first time that a polynomial method is applied to study structures made up of both an actuator and a transd

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4fb8958ae068d4ab6bb30e039c69d9be
https://uphf.hal.science/hal-03582336

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Propagating and non-propagating waves in infinite plates and rectangular cross section plates: orthogonal polynomial approach

Autor: X. M. Zhang, W. J. Xu, F. Benmeddour, J. G. Yu, J. E. Lefebvre

Publikováno v: Acta Mechanica
Acta Mechanica, 2017, 228 (11), pp.3755-3769. ⟨10.1007/s00707-017-1917-1⟩

JIF=2.113; International audience; The wave field near defect, edge or load represents a superposition of propagating and non-propagating modes. It is necessary to investigate the non-propagating wave characteristics if the wave scatter and edge reso

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::83985df8df79e904e503a3ae45e6ec8f
https://uphf.hal.science/hal-03560155

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Lamb wave acousto-optic modulator in ZnO/MgO multiple quantum wells and comparison with classical modulator

Autor: J. E. Lefebvre, T. Gryba, F. E. Ratolojanahary, L. Elmaimouni

Publikováno v: Applied Optics
Applied Optics, 2015, 54, pp.8786-8794. ⟨10.1364/AO.54.008786⟩
Applied optics
Applied optics, 2015, 54 (29), pp.8786-8794. ⟨10.1364/AO.54.008786⟩

International audience; An analysis of a ZnO/MgO multiple quantum well (MQW) acousto-optic modulator with Lamb waves is performed. With the MQW thickness in the range of 0.2 times the Lamb wavelength, the only observed Lamb modes are the lowest-order

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::843fb548c33422a291e4b191e40672ae
https://hal.archives-ouvertes.fr/hal-03245239

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Two true surface acoustic waves and other acoustic modes in (110) plane of Li2B4O7 substrate

Autor: T. Gryba, Victor Y. Zhang, J. E. Lefebvre

Publikováno v: Journal of Applied Physics. 86:3361-3370

The surface acoustic waves (SAWs) and other acoustic modes propagating in the (110) plane of Li2B4O7 are investigated by means of the effective surface permittivity (ESP). It is demonstrated that the velocity of all piezoactive SAWs, both true and ps

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ee57863cc0f4cd704348ed1f26804d08
https://doi.org/10.1063/1.371214

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Legendre polynomial approach for modeling free-ultrasonic waves in multilayered plates

Autor: T. Gryba, Victor Y. Zhang, J. E. Lefebvre, J. Gazalet

Publikováno v: Journal of Applied Physics. 85:3419-3427

Modeled on the Laguerre polynomial approach used for surface acoustic waves, a formulation is presented for the study of free-acoustic wave propagation in layered plates. It uses the Legendre polynomials. Each layer can be of arbitrary anisotropy and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3cb8f7aa4a1b477d4c80bcb486984081
https://doi.org/10.1063/1.369699

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Contribution to optimization of GaAs/Ga/sub 1-x/Al/sub x/As multiquantum-well acousto-electrooptic modulator

Autor: J. Gazalet, T. Gryba, V. Zhang, J. E. Lefebvre, S. Bahlak

Publikováno v: Journal of Lightwave Technology. 17:1455-1460

A theoretical study concerning a GaAs-Ga/sub 1-x/Al/sub x/As acousto-electrooptic (AEO) modulator is presented. This study deals with the effects of electric and strain fields generated by a piezoactive surface acoustic wave (SAW) on the optical abso

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::167436667b18811d00708320a9b52ffb
https://doi.org/10.1109/50.779168

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Conceptual advantages and limitations of the Laguerre polynomial approach to analyze surface acoustic waves in semi-infinite substrates and multilayered structures

Autor: Victor Y. Zhang, J. Gazalet, T. Gryba, J. E. Lefebvre

Publikováno v: Journal of Applied Physics. 83:28-34

Laguerre polynomial approach is used to calculate velocities, coupling coefficients, and field distributions of surface acoustic waves in both semi-infinite substrates and multilayered structures. Approximation used in boundary conditions for applyin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5d7ec3a71556f214599a15ba9db59579
https://doi.org/10.1063/1.366697

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Modeling of MEMS resonator piezoelectric disc by means of an equicharge current source method

Autor: L. Elmaimouni, Jiangong Yu, T. Gryba, A. Raherison, F. E. Ratolojanahary, J. E. Lefebvre

Publikováno v: Ultrasonics
Ultrasonics, Elsevier, 2013, 53, pp.1270-1279. ⟨10.1016/j.ultras.2013.03.011⟩
Ultrasonics, 2013, 53, pp.1270-1279. ⟨10.1016/j.ultras.2013.03.011⟩

The Legendre polynomial method has been extended to the modeling of MEMS resonator disc with current excitation (equicharge current source). Formulation is given that allows the electric current source to be taken into account. A unique formalism has

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9323e54852393f9a68511ea4d0d6cdd0
https://pubmed.ncbi.nlm.nih.gov/23618079

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Polynomial modeling of acoustic guided wave propagation in homogeneous cylinder of infinite length

Autor: T. Gryba, F. E. Ratolojanahary, A. Raherison, L. Elmaimouni, J. E. Lefebvre

Publikováno v: Proceedings of 2nd International Conference on Multimedia Computing and Systems, ICMCS'11
2nd International Conference on Multimedia Computing and Systems, ICMCS'11
2nd International Conference on Multimedia Computing and Systems, ICMCS'11, 2011, Ouarzazate, Morocco. pp.1-6, ⟨10.1109/ICMCS.2011.5945602⟩

In this paper, we present a polynomial approach for determining the acoustic guided waves in homogeneous infinitely long cylinders using elastic materials of cylindrical anisotropy. The formulation is based on linear three-dimensional elasticity usin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::10b4a251987da1287d7ad71e33ddd37a
https://doi.org/10.1109/icmcs.2011.5945602

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