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physics.app-ph2026
On the relation between time-reversed acoustics and Green's function retrieval in space-variant and in time-variant materials
Kees Wapenaar, Johannes Aichele, Dirk-Jan van Manen
The methods of time-reversed acoustics and Green's function retrieval are traditionally deployed for classical inhomogeneous, time-invariant materials. The mutual relation between…
physics.app-ph2024
Green's functions, propagation invariants, reciprocity theorems, wave-field representations and propagator matrices in 2D time-dependent materials
Kees Wapenaar
The study of wave propagation and scattering in time-dependent materials is a rapidly growing field of research. Whereas for 1D applications there is a simple relation between the…
physics.app-ph2024
Waves in space-dependent and time-dependent materials: a systematic comparison
Kees Wapenaar, Johannes Aichele, Dirk-Jan van Manen
Waves in space-dependent and time-dependent materials obey similar wave equations, with interchanged time- and space-coordinates. However, since the causality conditions are the sa…