Time-reversed acoustics in time-variant materials uses emission of a sign-reversed two-component wave field from a single time instant, while Green's function retrieval uses spatial crosscorrelation of wave fields at two time instants from two-component sources at one instant.
Space-Time Cross-Mapping and Application to Wave Scattering
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abstract
Causality creates an asymmetry between space and time, even though the wave equation treats them on equal footing. In this work, we leverage this asymmetry to construct a cross-mapping between space and time. This cross-mapping is applied to simplify scattering in space-varying media, by eliminating the infinite reflections between interfaces. The method is shown to transform the implicit transfer matrix method into an explicit method for the analysis of electromagnetic field scattering by a stratified medium.
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physics.app-ph 1years
2026 1verdicts
UNVERDICTED 1representative citing papers
citing papers explorer
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On the relation between time-reversed acoustics and Green's function retrieval in space-variant and in time-variant materials
Time-reversed acoustics in time-variant materials uses emission of a sign-reversed two-component wave field from a single time instant, while Green's function retrieval uses spatial crosscorrelation of wave fields at two time instants from two-component sources at one instant.