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Inducing Limited Transparency in Tissues by Time-Reversing Light
Inducing Limited Transparency in Tissues by Time-Reversing Light

Date: Monday, November 2, 2009
Time: 4:00 PM - 5:00 PM
Location: 125 Steele, Caltech
Speaker: Changhuei Yang


Abstract:
The reason we can't see through our hands isn't because our hands absorb light strongly. Instead, it is because our hands scatter light strongly.

Interestingly, light scattering in tissues may look random but their trajectories are deterministic. As such, it is possible to create a situation where light scattered from a tissue will retrace their paths through the tissue. This can be accomplished by time-reversing a light field via holography. I will report on our recent findings and point out a few applications for this phenomenon.

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