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<div align="center"><font face="Times New Roman" color="#000000">3rd
Annual Dasari Lecture</font></div>
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<div align="center"><font face="Times New Roman"
color="#000000"><b>Changhuei Yang</b></font></div>
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<div align="center"><font face="Times New Roman"
color="#000000"><i><b>Innovations in biophotonics- from $10 chip-scale
microscopes to time-reversal-induced tissue
transparency</b></i></font></div>
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</x-tab>Tuesday, October 6, 2009</font></div>
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- 1:00 p.m.</font></div>
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Room (34-401)</font></div>
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<div align="center"><font face="Times" color="#000000">Biophotonics is
a rapidly evolving research area aimed at providing new light-based
imaging, diagnostic and therapeutic tools for biologists and
clinicians. I will be talking about two areas of biophotonics research
that are occurring in my lab: 1) The Optofluidic Microscope - This
project fuses the advantages of optical and microfluidic technologies
to create small and cheap microscope systems that do not contain any
optical elements. The working principle is similar to the way we see
floaters in our eyes. This new way of formulating microscopes also
allows for remarkably simpler phase and darkfield microscope designs.
2) Tissue Scattering Suppression by Time Reversal Optical Phase
Conjugation - An approach for turning biological tissues transparent
through the use of holography. 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. I will report on our
recent findings and point out a few applications for this
phenomenon.</font></div>
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<div align="center"><font face="Times" color="#000000">Professor Yang
graduated from MIT in 2002 and has steadily moved towards warmer
climate thereafter. After short stints at ESPCI (Paris) and Duke
University, he settled down in Caltech in Dec 2003. Professor Yang
received the NSF CAREER award and the Coulter Foundation Early Career
Phase I and II Awards. In 2008 he was named one of Discover Magazine's
'20 Best Brains Under 40'.</font></div>
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color="#000000">Refreshments served following the seminar</font></div>
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color="#000000">Sponsored by the George R. Harrison Spectroscopy
Laboratory and the Department of Chemistry, Massachusetts Institute of
Technology</font></div>
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