title: Control of Energy Density inside a Disordered Medium by Coupling to Open or Closed Channels.
abstract: 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.
authors: Department of Applied Physics, Yale University, New Haven, Connecticut 06520, USA.
authors: Raktim
authors: R
authors: Sarma
authors: Department of Physics, Missouri University of Science & Technology, Rolla, Missouri 65409, USA.
authors: Alexey G
authors: AG
authors: Yamilov
authors: Department of Physics, Missouri University of Science & Technology, Rolla, Missouri 65409, USA.
authors: Sasha
authors: S
authors: Petrenko
authors: Department of Applied Physics, Yale University, New Haven, Connecticut 06520, USA.
authors: Yaron
authors: Y
authors: Bromberg
authors: Department of Applied Physics, Yale University, New Haven, Connecticut 06520, USA.
authors: Hui
authors: H
authors: Cao