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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 28, Iss. 5 — May. 1, 2011
  • pp: 1200–1203

Optimal concentration of light in turbid materials

E. G. van Putten, A. Lagendijk, and A. P. Mosk  »View Author Affiliations


JOSA B, Vol. 28, Issue 5, pp. 1200-1203 (2011)
http://dx.doi.org/10.1364/JOSAB.28.001200


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Abstract

In turbid materials it is impossible to concentrate light into a focus with conventional optics. Recently, it has been shown that the intensity on a dye-doped probe inside a turbid material can be enhanced by spatially shaping the wavefront of light before it enters a turbid medium. Here we show that this enhancement is due to concentration of light energy to a spot much smaller than a wavelength. We focus light on a dye-doped probe sphere that is hidden by an opaque layer. The light ( λ = 532 nm ) is optimally concentrated to a focal area smaller than 0.037 μm 2 . The focus can be substantially smaller than the used probe. We use a comparison between the emission and excitation intensity to show the light is concentrated to a spot below the resolution of our oil-immersion objective. The results are in good agreement with an optimal concentration of linearly or elliptically polarized light.

© 2011 Optical Society of America

OCIS Codes
(030.6600) Coherence and statistical optics : Statistical optics
(290.1990) Scattering : Diffusion
(290.4210) Scattering : Multiple scattering

ToC Category:
Scattering

History
Original Manuscript: December 9, 2010
Revised Manuscript: March 14, 2011
Manuscript Accepted: March 21, 2011
Published: April 21, 2011

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

Citation
E. G. van Putten, A. Lagendijk, and A. P. Mosk, "Optimal concentration of light in turbid materials," J. Opt. Soc. Am. B 28, 1200-1203 (2011)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-28-5-1200


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