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Elastic‐wave surfaces in solids
Author(s) -
Ledbetter H. M.,
Kriz R. D.
Publication year - 1982
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221140221
Subject(s) - transverse plane , transverse wave , longitudinal mode , transverse mode , anisotropy , longitudinal wave , physics , orthorhombic crystal system , surface wave , surface (topology) , condensed matter physics , optics , wave propagation , diffraction , geometry , wavelength , mathematics , engineering , laser , structural engineering
Based on Christoffel‐equation solutions, some interesting wave‐surface topological features are described for anisotropic media. These features include crossovers of transverse—longitudinal surfaces and continuous transverse—longitudinal mode conversion over a single surface. For orthorhombic symmetry (mmm), crossovers of transverse—transverse surfaces occur for all crystals: the transverse surfaces interconnect and form a single surface. Beyond this, some orthorhombic crystals exhibit a longitudinal—transverse crossover that causes all three surfaces to interconnect into a single surface. Crossover of longitudinal and transverse surfaces means that a transverse wave velocity will exceed a longitudinal wave velocity. A longitudinal—transverse mode conversion means that both longitudinal and transverse modes exist on the same wave surface.