Position-dependent diffusion of light in disordered waveguides
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...
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| Veröffentlicht in: | Physical review letters 2014-01, Vol.112 (2), p.023904-023904, Article 023904 |
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| container_title | Physical review letters |
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| creator | Yamilov, Alexey G Sarma, Raktim Redding, Brandon Payne, Ben Noh, Heeso Cao, Hui |
| description | 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. |
| doi_str_mv | 10.1103/PhysRevLett.112.023904 |
| format | Article |
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| ispartof | Physical review letters, 2014-01, Vol.112 (2), p.023904-023904, Article 023904 |
| issn | 0031-9007 1079-7114 |
| language | eng |
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| source | American Physical Society |
| subjects | Control systems Diffusion Diffusion coefficient Dissipation Localization Monitors Transport Waveguides |
| title | Position-dependent diffusion of light in disordered waveguides |
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