Unified treatment for classical waves in two-dimensional media

Details Unified treatment for classical waves in two-dimensional media Unified treatment for classical waves in two-dimensional media

2004-09-08

arxiv.org/abs/cond-mat/0409191v1

Physics

Condensed Matter

Materials Science

9 pages, no figure. Submitted to Phys. Rev. E

Scientific paper

A unified treatment for the propagation of classical waves in inhhomogeneous media is proposed. We deal with four kinds of waves, they are the acoustic wave in fluid, the elastic shear wave in two diemnsional solid, and the E- and H-polarized electromagnetic waves in two diemnsional lossless medium. We first show that a universal wave equation governing the wave motion of all these four kinds of waves can be derived. We then introduce an auxiliary field, and give the universal expressions for the energy densities and energy flows of these waves. This unified treatment provides intuitive insights, which may be helpful in understanding the essential physics of various wave phenomena, or useful for designing new photonic and sonic devices.

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