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Wave-focusing to subsurface targets using a switching time-reversal mirror
https://orcid.org/0000-0002-8221-3645
https://orcid.org/0000-0003-4854-6435
https://orcid.org/0000-0002-7701-6989
Abstract The need for wave energy focusing to selected targets embedded within a host is commonly shared among various engineering fields, whether for stimulation and imaging in exploration geophysics, or for contaminant removal in geo-environmental engineering, or even for diagnostic/therapeutic purposes in medicine. In this paper, we are concerned with the feasibility of focusing wave energy to multiple subsurface targets embedded within a semi-infinite heterogeneous elastic host, by exploiting the time-reversibility of the lossless wave equation under adverse conditions for time reversal. Of particular interest for practical applications in geophysics is the need for a switching time-reversing mirror, where recorded Dirichlet data must be time-reversed as Neumann data due to equipment constraints. In the absence of theoretical guarantees, we turn to numerical experiments and report that wave-focusing can be indeed realized, despite various departures from the theoretically ideal time reversal case.
Highlights Elastic time-reversal-based wave-focusing for geophysical applications. Simultaneous stimulation of multiple subsurface targets. Time-reversal-based focusing using a switching mirror.
Wave-focusing to subsurface targets using a switching time-reversal mirror
https://orcid.org/0000-0002-8221-3645
https://orcid.org/0000-0003-4854-6435
https://orcid.org/0000-0002-7701-6989
Abstract The need for wave energy focusing to selected targets embedded within a host is commonly shared among various engineering fields, whether for stimulation and imaging in exploration geophysics, or for contaminant removal in geo-environmental engineering, or even for diagnostic/therapeutic purposes in medicine. In this paper, we are concerned with the feasibility of focusing wave energy to multiple subsurface targets embedded within a semi-infinite heterogeneous elastic host, by exploiting the time-reversibility of the lossless wave equation under adverse conditions for time reversal. Of particular interest for practical applications in geophysics is the need for a switching time-reversing mirror, where recorded Dirichlet data must be time-reversed as Neumann data due to equipment constraints. In the absence of theoretical guarantees, we turn to numerical experiments and report that wave-focusing can be indeed realized, despite various departures from the theoretically ideal time reversal case.
Highlights Elastic time-reversal-based wave-focusing for geophysical applications. Simultaneous stimulation of multiple subsurface targets. Time-reversal-based focusing using a switching mirror.
Wave-focusing to subsurface targets using a switching time-reversal mirror
https://orcid.org/0000-0002-8221-3645
https://orcid.org/0000-0003-4854-6435
https://orcid.org/0000-0002-7701-6989
Abstract The need for wave energy focusing to selected targets embedded within a host is commonly shared among various engineering fields, whether for stimulation and imaging in exploration geophysics, or for contaminant removal in geo-environmental engineering, or even for diagnostic/therapeutic purposes in medicine. In this paper, we are concerned with the feasibility of focusing wave energy to multiple subsurface targets embedded within a semi-infinite heterogeneous elastic host, by exploiting the time-reversibility of the lossless wave equation under adverse conditions for time reversal. Of particular interest for practical applications in geophysics is the need for a switching time-reversing mirror, where recorded Dirichlet data must be time-reversed as Neumann data due to equipment constraints. In the absence of theoretical guarantees, we turn to numerical experiments and report that wave-focusing can be indeed realized, despite various departures from the theoretically ideal time reversal case.
Highlights Elastic time-reversal-based wave-focusing for geophysical applications. Simultaneous stimulation of multiple subsurface targets. Time-reversal-based focusing using a switching mirror.
Wave-focusing to subsurface targets using a switching time-reversal mirror
Koo, Seungbum (author) / Goh, Heedong (author) / Kallivokas, Loukas F. (author)
2022-12-21
Article (Journal)
Electronic Resource
English
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