ECE Seminar: Renjie Zhou

  • Starts: 11:00 am on Tuesday, February 9, 2016
  • Ends: 12:00 pm on Tuesday, February 9, 2016
ECE Seminar: Renjie Zhou Massachusetts Institute of Technology George R. Harrison Spectroscopy Laboratory Faculty Host: Siddharth Ramachandram Light refreshments will be available outside of PHO 339 at 10:45 am. Quantitative Phase Imaging: A Label-Free Pathway from Metrology to Biology Applications Abstract: Advances in imaging sensors and computer chips have enabled us to record holograms on cameras and reconstruct objects information with high fidelity and fast speed. The marriage of digital holography and microscopy gave birth to quantitative phase imaging (QPI). QPI, as a full field imaging technique, precisely measures the amplitude and phase information associated with the electromagnetic field scattered by an object. Recent efforts have pushed QPI to achieve phase sensitivity down to 1 mrad, corresponding to less than 1 nm topographic changes, or conversely 10-4 refractive index variations in transparent biological structures. This talk will highlight the applications of QPI in two important domains, namely metrology and biology. First, Zhou will outline the QPI potential to facilitate material characterization and wafer defect metrology. In particular, he will show his results on using QPI for densely patterned semiconductor wafer inspecting, detecting deep sub-wavelength patterning defects in 22nm and 9nm node silicon wafers. The other focal point of this talk is on the development of QPI-based techniques for biological imaging, especially on solving inverse scattering for determining the structure of cells in 3D, which led to the invention of White-light Diffraction Tomography (WDT). WDT is compatible with most exiting phase contrast microscopes, thus, it can potentially complement fluorescence imaging by providing additional biophysical markers. At the end, Zhou will discuss some potential research areas along the QPI direction. Bio: Renjie Zhou is a postdoctoral associate at George R. Harrison Spectroscopy Laboratory at MIT, where his research centers on developing ultra-sensitive interferometric microscopy systems and high throughput 3D imaging methods for biomedical application. Dr. Zhou received PhD in Electrical and Computer Engineering from the University of Illinois at Urbana-Champaign (UIUC) in 2014. His dissertation focused on developing wafer defect inspection instruments and solving inverse scattering problems for cell imaging. Dr. Zhou has co-authored over 40 peer-reviewed journal and conference papers and 4 US patent applications either issued or pending. He has received a number of research awards including the Beckman Fellowship from the Beckman Foundation, Scholarship in Optics & Photonics and Newport Spectra - Physics Research Excellence Travel Grant from SPIE; Jean Bennett Memorial Student Travel Grant finalist from OSA; P. D. Coleman Outstanding Research Award and Yuen T. Lo Outstanding Graduate Research Award from UIUC. In addition, his research work was featured in Nature, NSF, OSA, and SPIE news.
Location:
Photonics Center, Room 339, 8 St. Mary's St.
Registration:
http://www.bu.edu/ece/files/2016/02/ZhouFlyerHIGH-01.jpg