Energy current imaging method for time reversal in elastic media

Anderson, Brian E.; Guyer, Robert A.; Ulrich, Timothy J.; Le Bas, Pierre-Yves; Larmat, Carène; Griffa, Michele; Johnson, Paul A.
July 2009
Applied Physics Letters;7/13/2009, Vol. 95 Issue 2, p021907
Academic Journal
An energy current imaging method is presented for use in locating sources of wave energy during the back propagation stage of the time reversal process. During the back propagation phase of an ideal time reversal experiment, wave energy coalesces from all angles of incidence to recreate the source event; after the recreation, wave energy diverges in every direction. An energy current imaging method based on this convergence/divergence behavior has been developed. The energy current imaging method yields a smaller spatial distribution for source reconstruction than is possible with traditional energy imaging methods.


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