Waves are everywhere, from the smallest scales to the largest, from waves which oscillate in a pico second, to ones which change over may years, and from waves with length scales smaller than the size of the atom, to waves which stress across the galaxy. Waves lie at the heart of much of modern technology, physics, chemistry, biology, medical imaging, music, popular culture and are all around u...

Various types of waves are produced when a harmonic force is applied to a semi-infinite half space elastic medium. In particular, surface waves are perturbations with transverse and longitudinal components of displacement that propagate in the boundary region at the surface of the elastic solid. Shear wave speed estimation is the standard for characterizing elastic properties of tissue in elast...

We demonstrate energy exchange between two orthogonally polarized optical waves as a consequence of a two-color multistep parametric interaction. The energy exchange results from cascading of two quasi-phase-matched (QPM) second-harmonic parametric processes, and it is intrinsically instantaneous. The effect is observed when both the type-I (ooe) second-harmonic generation process and higher QP...