Abstract

We present direct experimental evidence for position-dependent diffusion in open random media. The interference of light in time-reversed paths results in renormalization of the diffusion coefficient, which varies spatially. To probe the wave transport inside the system, we fabricate two-dimensional disordered waveguides and monitor the light intensity from the third dimension. Change the geometry of the system or dissipation limits the size of the loop trajectories, allowing us to control the renormalization of the diffusion coefficient. This work shows the possibility of manipulating wave diffusion via the interplay of localization and dissipation.

Department(s)

Physics

Keywords and Phrases

Disordered Waveguides; Experimental Evidence; Light Intensity; Random Media; Renormalization; Time-reversed; Wave Diffusion; Wave Transport; Diffusion; Waveguides; Two Dimensional

International Standard Serial Number (ISSN)

0031-9007

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2014 American Physical Society (APS), All rights reserved.

Included in

Physics Commons

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