• Open Access

Controlling the intensity of light in large areas at the interfaces of a scattering medium

Oluwafemi S. Ojambati, John T. Hosmer-Quint, Klaas-Jan Gorter, Allard P. Mosk, and Willem L. Vos
Phys. Rev. A 94, 043834 – Published 19 October 2016

Abstract

The recent advent of wave-shaping methods has demonstrated the focusing of light through and inside even the most strongly scattering materials. Typically in wavefront shaping, light is focused in an area with the size of one speckle spot. It has been shown that the intensity is not only increased in the target speckle spot, but also in an area outside the optimized speckle spot. Consequently, the total transmission is enhanced, even though only the intensity in a single speckle spot is controlled. Here, we experimentally study how the intensity enhancement on both interfaces of a scattering medium depends on the optimization area on the transmission side. We observe that as the optimization radius increases, the enhancement of the total transmitted intensity increases. We find a concomitant decrease of the total reflected intensity, which implies an energy redistribution between transmission and reflection channels. In addition, we find qualitative evidence of a long-range reflection-transmission correlation. Our result is useful for efficient light harvesting in solar cells, multichannel quantum secure communications, imaging, and complex beam delivery through a scattering medium.

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  • Received 12 July 2016

DOI:https://doi.org/10.1103/PhysRevA.94.043834

Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied PhysicsStatistical Physics & ThermodynamicsAtomic, Molecular & Optical

Authors & Affiliations

Oluwafemi S. Ojambati1,*, John T. Hosmer-Quint1,2, Klaas-Jan Gorter1, Allard P. Mosk1,†, and Willem L. Vos1

  • 1Complex Photonic Systems (COPS), MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
  • 2Department of Physics, Lawrence University, 711 E. Boldt Way, Appleton, WI 54911, USA

  • *o.s.ojambati@utwente.nl
  • Current address: Physics of Light in Complex Systems, Debye Institute for Nanomaterials Science, Utrecht University.

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Issue

Vol. 94, Iss. 4 — October 2016

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