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  Experimental Observation of a Fundamental Length Scale of Waves in Random Media

Barkhofen, S., Metzger, J. J., Fleischmann, R., Kuhl, U., & Stöckemann, H.-J. (2013). Experimental Observation of a Fundamental Length Scale of Waves in Random Media. Physical Review Letters, 111(18): 183902. doi:10.1103/PhysRevLett.111.183902.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-0F9B-9 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-C222-2
Genre: Journal Article

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 Creators:
Barkhofen, Sonja, Author
Metzger, Jakob J.1, Author              
Fleischmann, Ragnar1, Author              
Kuhl, Ulrich, Author
Stöckemann, Hans-Jürgen, Author
Affiliations:
1Department of Nonlinear Dynamics, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063286              

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 Abstract: Waves propagating through a weakly scattering random medium show a pronounced branching of the flow accompanied by the formation of freak waves, i.e., extremely intense waves. Theory predicts that this strong fluctuation regime is accompanied by its own fundamental length scale of transport in random media, parametrically different from the mean free path or the localization length. We show numerically how the scintillation index can be used to assess the scaling behavior of the branching length. We report the experimental observation of this scaling using microwave transport experiments in quasi-two-dimensional resonators with randomly distributed weak scatterers. Remarkably, the scaling range extends much further than expected from random caustics statistics.

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Language(s): eng - English
 Dates: 2013-11-01
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: Peer
 Identifiers: eDoc: 673703
DOI: 10.1103/PhysRevLett.111.183902
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Title: Physical Review Letters
Source Genre: Journal
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Pages: - Volume / Issue: 111 (18) Sequence Number: 183902 Start / End Page: - Identifier: -