Control of Energy Density inside a Disordered Medium by Coupling to Open or Closed Channels

Raktim Sarma, Alexey G. Yamilov, Sasha Petrenko, Yaron Bromberg, Hui Cao

Research output: Contribution to journalArticlepeer-review

58 Scopus citations


We demonstrate experimentally the efficient control of light intensity distribution inside a random scattering system. The adaptive wave front shaping technique is applied to a silicon waveguide containing scattering nanostructures, and the on-chip coupling scheme enables access to all input spatial modes. By selectively coupling the incident light to the open or closed channels of the disordered system, we not only vary the total energy stored inside the system by a factor of 7.4, but also change the energy density distribution from an exponential decay to a linear decay and to a profile peaked near the center. This work provides an on-chip platform for controlling light-matter interactions in turbid media.

Original languageAmerican English
Article number086803
JournalPhysical Review Letters
Issue number8
StatePublished - 17 Aug 2016
Externally publishedYes

Bibliographical note

Funding Information:
We acknowledge Chia-Wei Hsu, Douglas Stone, Hasan Yilmaz, Seng Fatt Liew, and Brandon Redding for useful discussions. This work was supported by the National Science Foundation under Grants No.ADMR-1205307 and No.ADMR-1205223. Facilities use was supported by YINQE and NSF MRSEC Grant No.ADMR-1119826.

Publisher Copyright:
© 2016 American Physical Society.


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