2011-05-01
Optimal concentration of light in turbid materials
Publication
Publication
J. Opt. Soc. Am. B , Volume 28 - Issue 5 p. 1200- 1203
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 ¼ 532nm) is optimally concentrated to a focal area smaller than 0:037 μm2. 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.
| Additional Metadata | |
|---|---|
| doi.org/10.1364/JOSAB.28.001200 | |
| J. Opt. Soc. Am. B | |
|
van Putten, E. G., Lagendijk, A., & Mosk, A. (2011). Optimal concentration of light in turbid materials. J. Opt. Soc. Am. B, 28(5), 1200–1203. doi:10.1364/JOSAB.28.001200 |
|
