Nonlinear surface acoustic waves: realization of solitary pulses and fracture.

Abstract:

:A laser-based technique for the contact-free generation and detection of strongly nonlinear surface acoustic wave (SAW) pulses with amplitudes limited by the materials strength has been developed. The effects of nonlinear propagation of short elastic surface pulses with finite strength in isotropic solids, such as fused quartz, anisotropic solids, such as silicon, and dispersive media were investigated. Solitary surface wave propagation was observed in layered structures for normal and anomalous dispersion. In addition, a SAW-based method for evaluating the critical fracture stress of anisotropic brittle solids, such as single crystal silicon, is introduced.

journal_name

Ultrasonics

journal_title

Ultrasonics

authors

Lomonosov AM,Hess P

doi

10.1016/j.ultras.2008.06.002

subject

Has Abstract

pub_date

2008-11-01 00:00:00

pages

482-7

issue

6-7

eissn

0041-624X

issn

1874-9968

pii

S0041-624X(08)00093-0

journal_volume

48

pub_type

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