Phase control algorithms for focusing light through turbid media

By Ivo M. Vellekoop, Allard P. Mosk. 2007

460 citations recorded by the source corpus.

Light propagation in materials with microscopic inhomogeneities is affected by scattering. In scattering materials, such as powders, disordered metamaterials or biological tissue, multiple scattering on sub-wavelength particles makes light diffuse. Recently, we showed that it is possible to construct a wavefront that focuses through a solid, strongly scattering object. The focusing wavefront uniquely matches a certain configuration of the particles in the medium. To focus light through a turbid liquid or living tissue, it is necessary to dynamically adjust the wavefront as the particles in the medium move. Here we present three algorithms for constructing a wavefront that focuses through a scattering medium. We analyze the dynamic behavior of these algorithms and compare their sensitivity to measurement noise. The algorithms are compared both experimentally and using numerical simulations. The results are in good agreement with an intuitive model, which may be used to develop dynamic diffusion compensators with applications in, for example, light delivery in human tissue.

Subfields: Acoustics and Ultrasonics, Biomedical Engineering, Geophysics

View Paper: https://www.semanticscholar.org/paper/3310bedc13420371667a21342c4a25806a0312d4

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Acoustics and Ultrasonics

1. S. Rotter
2. Sylvain Gigan
3. Ori Katz
4. Y. Bromberg
5. Yaron R. Silberberg
6. Eran Small
7. Guohai Situ

In Biomedical Engineering

1. S. Rotter
2. Sylvain Gigan
3. Ori Katz
4. Y. Bromberg
5. Yaron R. Silberberg
6. Eran Small

In Geophysics

1. Ori Katz
2. Y. Bromberg
3. Yaron R. Silberberg
4. Sylvain Gigan
5. Eran Small
6. S. Rotter

Citations in the corpus

• Focusing and compression of ultrashort pulses through scattering media (2010, methodology): “As in the work of Vellekoop and colleagues, the incoming wavefront phase was adaptively optimized using a two-dimensional SL”
• Light fields in complex media: Mesoscopic scattering meets wave control (2017, background): “(Figure adapted from (Vellekoop and Mosk, 2008b).) cal result was later verified experimentally in (Kim et al., 2013).”