Center for Molecular Spectroscopy and Dynamics

2017 ABC

To apply photonics technologies for in vivo applications, efficient delivery of light energy to targets embedded deep within scattering media is critical. Here we present a method to counteract random diffusion and to focus ‘snake-like’ multiple-scattered waves to the target embedded deep within scattering media. To realize this, we experimentally identified and injected light to the time-gated reflection eigenchannels of a specific flight time where most of the multiple-scattered waves have interacted with the target object. For targets embedded too deep to be resolved by optical imaging, we achieved more that 10-fold enhancement in light energy delivery compared to uncontrolled inputs.