Title :
Nonlinear acoustic waves localized at crystal edges
Author :
Mayer, Andreas P. ; Lomonosov, Alexey M. ; Hess, Peter
Author_Institution :
Fak. B+W, HS Offenburg - Univ. of Appl. Sci., Gengenbach, Germany
Abstract :
Anisotropy has been found to play an important role for the existence of edge-localized acoustic modes as well as for nonlinear effects in rectangular edges. For a certain propagation geometry in silicon, the effective second-order nonlinearity for wedge waves was determined numerically from second-order and third-order elastic moduli and compared with the nonlinearity for Rayleigh waves propagating in the direction of the apex on one of the two surfaces forming the edge. In the presence of weak dispersion resulting from modifications of the wedge tip or coating of the adjacent surfaces, solitary pulses are predicted to exist and their shape was calculated.
Keywords :
Rayleigh waves; crystal structure; elastic moduli; nonlinear acoustics; silicon; surface acoustic waves; Rayleigh wave nonlinearity; Si; anisotropy; crystal edges; edge localized acoustic modes; localised nonlinear acoustic waves; nonlinear effects; propagation geometry; rectangular edges; second order elastic moduli; second order nonlinearity; silicon; solitary pulses; third order elastic moduli; weak dispersion; wedge waves; Acoustic propagation; Acoustic pulses; Acoustic waves; Anisotropic magnetoresistance; Nonlinear acoustics; Optical pulses; Optical surface waves; Pulse shaping methods; Shape; Surface acoustic waves; Edge mode; anisotropy; nonlinearity; soliton; wedge wave;
Conference_Titel :
Ultrasonics Symposium (IUS), 2009 IEEE International
Conference_Location :
Rome
Print_ISBN :
978-1-4244-4389-5
Electronic_ISBN :
1948-5719
DOI :
10.1109/ULTSYM.2009.5441612
