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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 6, Iss. 3 — Mar. 18, 2011

Focusing light through random photonic media by binary amplitude modulation

D. Akbulut, T. J. Huisman, E. G. van Putten, W. L. Vos, and A. P. Mosk  »View Author Affiliations

Optics Express, Vol. 19, Issue 5, pp. 4017-4029 (2011)

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We study the focusing of light through random photonic materials using wavefront shaping. We explore a novel approach namely binary amplitude modulation. To this end, the light incident to a random photonic medium is spatially divided into a number of segments. We identify the segments that give rise to fields that are out of phase with the total field at the intended focus and assign these a zero amplitude, whereas the remaining segments maintain their original amplitude. Using 812 independently controlled segments of light, we find the intensity at the target to be 75±6 times enhanced over the average intensity behind the sample. We experimentally demonstrate focusing of light through random photonic media using both an amplitude only mode liquid crystal spatial light modulator and a MEMS-based spatial light modulator. Our use of Micro Electro-Mechanical System (MEMS)-based digital micromirror devices for the control of the incident light field opens an avenue to high speed implementations of wavefront shaping.

© 2011 Optical Society of America

OCIS Codes
(030.6600) Coherence and statistical optics : Statistical optics
(110.7050) Imaging systems : Turbid media
(290.4210) Scattering : Multiple scattering

ToC Category:
Coherence and Statistical Optics

Original Manuscript: January 3, 2011
Manuscript Accepted: February 4, 2011
Published: February 15, 2011

Virtual Issues
Vol. 6, Iss. 3 Virtual Journal for Biomedical Optics

D. Akbulut, T. J. Huisman, E. G. van Putten, W. L. Vos, and A. P. Mosk, "Focusing light through random photonic media by binary amplitude modulation," Opt. Express 19, 4017-4029 (2011)

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