Optical methods are extensively used for tissue imaging in the biomedical sector but they are limited for deep tissue analysis due to massive losses by strong light scattering, which can be mitigated with the use of ultrasound. The authors present proof-of-concept experiments showing transient ultrasound waves transversal to the direction of propagation of laser light that can be used to waveguide in the bulk of the scattering medium to a depth of 90 mean free paths.
- Maxim N. Cherkashin
- Carsten Brenner
- Martin R. Hofmann
