Experimental evidence is given of acoustic plate waves, whose group velocity is contradirected with respect to the phase velocity, through a determination of the acoustic wavelength dependence on frequency, in a limited range of frequencies. The dependence d Lambda /d Omega >0 between wavelength and frequency is experimentally verified, as the required condition for acousto-optical diffraction, where higher frequency components would scatter light into smaller diffraction angles.

Conditions for anomalous acousto-optical diffraction by backward propagating acoustic waves / Alippi, Adriano; Bettucci, Andrea; Germano, Massimo. - In: PHYSICAL REVIEW E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS. - ISSN 1539-3755. - STAMPA. - 63:(2001), p. 026604. [10.1103/PhysRevE.63.026604]

Conditions for anomalous acousto-optical diffraction by backward propagating acoustic waves

ALIPPI, Adriano;BETTUCCI, Andrea;GERMANO, Massimo
2001

Abstract

Experimental evidence is given of acoustic plate waves, whose group velocity is contradirected with respect to the phase velocity, through a determination of the acoustic wavelength dependence on frequency, in a limited range of frequencies. The dependence d Lambda /d Omega >0 between wavelength and frequency is experimentally verified, as the required condition for acousto-optical diffraction, where higher frequency components would scatter light into smaller diffraction angles.
backward propagating mode; anomalous diffraction
01 Pubblicazione su rivista::01a Articolo in rivista
Conditions for anomalous acousto-optical diffraction by backward propagating acoustic waves / Alippi, Adriano; Bettucci, Andrea; Germano, Massimo. - In: PHYSICAL REVIEW E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS. - ISSN 1539-3755. - STAMPA. - 63:(2001), p. 026604. [10.1103/PhysRevE.63.026604]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/251123
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