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Titolo:
High-velocity waveguide acoustic modes in solids
Autore:
Darinskii, AN; Weihnacht, M;
Indirizzi:
Inst Solid State & Mat Res, D-01171 Dresden, Germany Inst Solid State & Mat Res Dresden Germany D-01171 1171 Dresden, Germany Russian Acad Sci, Inst Crystallog, Moscow 117333, Russia Russian Acad SciMoscow Russia 117333 Crystallog, Moscow 117333, Russia
Titolo Testata:
JOURNAL OF APPLIED PHYSICS
fascicolo: 1, volume: 88, anno: 2000,
pagine: 471 - 477
SICI:
0021-8979(20000701)88:1<471:HWAMIS>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
REFLECTION; WAVES; CRYSTAL; DEFECT; LAYER;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: Weihnacht, M Inst Solid State & Mat Res, PO 27 00 16, D-01171 Dresden, Germany Inst Solid State & Mat Res PO 27 00 16 Dresden Germany D-01171
Citazione:
A.N. Darinskii e M. Weihnacht, "High-velocity waveguide acoustic modes in solids", J APPL PHYS, 88(1), 2000, pp. 471-477

Abstract

It is shown that a layered waveguide can support the propagation of nonattenuated acoustic modes of which the phase velocity exceeds the velocity of both the quasitransverse bulk waves in the medium that surrounds the waveguide. These high-velocity modes appear at a special choice of materials for the external medium and the waveguide. Numerical computations are performedfor a number of structures. A comparison is given of numerical results with approximate analytical estimations. A criterion for the existence of high-velocity waveguide modes at small values of the thickness/wavelength ratiois derived. (C) 2000 American Institute of Physics. [S0021-8979(00)05012-X].

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Documento generato il 01/12/20 alle ore 10:31:09