Conversion excitation of intense sound fields in crystals

• Autorzy: Alshits V. , Bessonova D. , Lyubimov V. , Radowicz A.
• Konferencja: Symposium “Vibrations In Physical Systems” (26 ; 04-08.05.2014 ; Będlewo koło Poznania ; Polska)
• Języki publikacji: EN

Abstrakty

EN

The resonant excitation of an intense elastic wave in a crystal is described through a special nonspecular reflection close to a conversion when almost all the energy from the incident pump wave falls into the near-surface narrow high-intensity reflected beam. The resonance arises when the excited reflected wave is close to the bulk eigenmode satisfying the condition of free boundary. It is shown that the choice of the crystal surface parallel to a symmetry plane allows simultaneous optimization of reflection geometry when the intensity maximum for the excited wave is accompanied by the intensity minimum for the other (parasite) reflected wave. And the conversion criterion of vanishing of the above minimum is determined by one definite condition on elastic moduli. On this basis the series of real monoclinic, orthorhombic and hexagonal crystals were chosen where the resonant reflection in non-symmetric sagittal planes proves to be very close to conversion.

Słowa kluczowe

EN

elastic wave; resonance reflection; conversion; pump wave; anisotropy; diffraction divergence

PL

fala sprężysta; odbicie rezonansu; konwersja; fala pompująca; anizotropia; rozbieżność dyfrakcji

• Wydawca: Poznan University of Technology. Institute of Applied Mechanics
• Czasopismo: Vibrations in Physical Systems
• Rocznik: 2014
• Tom: Vol. 26
• Strony: 13--20
• Opis fizyczny: Bibliogr. 8 poz., rys., wykr.

Twórcy

autor

Alshits V.

• A.V. Shubnikov Institute of Crystallography, Russian Academy of Sciences, Leninskii pr. 59,119333 Moscow, Russia
• Polish-Japanese Institute of Information Technology, Koszykowa 86, 02-008 Warsaw, Poland

autor

Bessonova D.

• A.V. Shubnikov Institute of Crystallography, Russian Academy of Sciences, Leninskii pr. 59,119333 Moscow, Russia

autor

Lyubimov V.

• A.V. Shubnikov Institute of Crystallography, Russian Academy of Sciences, Leninskii pr. 59,119333 Moscow, Russia

autor

Radowicz A.

• Kielce University of Technology, Al. Tysiaclecia P.P. 7, 25-314 Kielce, Poland

Bibliografia

• 1. K.S. Aleksandrov, B.P. Sorokin, S.I. Burkov, Effective piezoelectric crystals for acoustoelectronics, piezotechnics and sensors, Nauka, Novosibirsk 2007.
• 2. D. Royer, E. Dieulesaint, Elastic waves in solids, I, II, Springer, Berlin 2000.
• 3. F.I. Fedorov, Theory of elastic waves in crystal, Plenum, New York 1968.
• 4. V.I. Alshits, in: Surface waves in anisotropic and laminated bodies and defects detection, Eds. R.V. Goldstein, G.A. Maugin, Kluwer Academic, Dordrecht 2004.
• 5. V.I. Alshits, D.A. Bessonov, V.N. Lyubimov, Resonant excitation of intense acoustic waves in crystals, J. Exp. Theor. Phys., 116, No. 6 (2013) 928–944.
• 6. V. I. Alshits, D.A. Bessonov, V.N. Lyubimov, Excitation of intense acoustic waves in hexagonal crystals, Crystallography Reports, 58, No. 6 (2013) 867–876.
• 7. V.I. Alshits, J. Lothe, Elastic waves in triclinic crystals. III. Existence problem and some general properties of exceptional surface waves, Krystallografiya, 24, No. 6 (1979) 1122-1130 [translation: Sov. Phys. Crystallogr., 24, No. 6 (1979) 644-648].
• 8. H.H. Landolt, R. Börnstein, Zahlenwerte und funktionen aus naturwissenschaften und technik: neue serie, Vol. III/11, Ed. K.-H. Hellwege, Springer, Berlin 1979.