Cal Poly Pomona

Physics and Astronomy Seminar

Thursday, March 29, 2012

Novel Optical Approaches for Biomedical Applications

From dime-size microscopes to time-reversal based suppression of tissue turbidity

Changhuei Yang

Electrical Engineering and Bioengineering, California Institute of Technology

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:

Chip-scale microscopes – This project fuses the advantages of optical and semiconductor technologies to create small and cheap microscope systems and self-imaging petri dish systems. The working principle is similar to the way we see floaters in our eyes. The application range of this invention is wide: it can change the way biologists think about and use microscope, it can enable clinical point-of-care blood and urine analysis, and it can improve heathcare by streamlining petri-dish procedures.

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.

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, the Coulter Foundation Early Career Phase I and II Awards, the NIH Director's New Innovator Award. In 2008 he was named one of Discover Magazine’s ‘20 Best Brains Under 40’.

Refreshments at 10:50 AM. Seminar begins at 11:00 AM.
Building 8, Room 241
For further information, please call (909) 869-4014

Last modified on March 19, 2012
Questions, comments, or concerns about this website?