Matter radiates both propagating and evanescent electromagnetic waves. Superlensing results from the enhancement of evanescent waves by surface plasmons. It has strong anisotropic hyperbolic dispersion allowing super-resolution with converting evanescent waves into propagating waves. Similarly, phonons are also capable of producing evanescent waves in a total internal reflection geometry. Evanescent coupling, as near field interaction, is one of the concerns in electromagnetic compatibility. In addition, both propagating and evanescent waves contribute to the resolution of the image. Evanescent wave coupling is used in powering devices wirelessly. However, for example in evanescent waves momentum is transverse to direction of propagation. The symmetric modes consisting of two evanescent waves would form a catenary shape. The doctrine asserts that all of conditioned existence, without exception, is "transient, evanescent, inconstant". In classical wave-physics, this effect is known as evanescent wave coupling. This compensates for the swiftly decaying evanescent waves. This reflection forms the evanescent wave which extends into the sample. ATR uses a property of total internal reflection resulting in an evanescent wave. This sensitivity is due to the shallow penetration depth of the evanescent wave.