Invited Speakers

Liang Gao (University of Illinois, USA)

Compressed Ultrafast Photography: Catching photons on the fly by Compressed Ultrafast Photography

Title: Compressed Ultrafast Photography: redefining the limit of passive ultrafast imaging
Author: Liang Gao
Affiliation: University of Illinois, Urbana-Champaign
Email: gaol[at]illinois.edu
Catching photons on the fly by Compressed Ultrafast Photography
We demonstrate a two-dimensional dynamic imaging technique, compressed ultrafast photography (CUP), which can capture non-repetitive time-evolving events at up to 100 billion fps.  Compared with existing ultrafast imaging techniques, CUP has a prominent advantage of measuring an x, y, t (x, y, spatial coordinates; t, time) scene with a single camera snapshot, thereby allowing observation of transient events occurring on a time scale down to tens of picoseconds. Using CUP, we visualise four fundamental physical phenomena with single laser shots only: laser pulse reflection, refraction, photon racing in two media, and faster-than-light propagation of non-information.  Given CUP’s capability, we expect it to find widespread applications in both fundamental and applied sciences including biomedical research.
Biographical Sketch: Dr. Liang Gao is currently an Assistant Professor in Electrical and Computer Engineering department at University of Illinois Urbana-Champaign. His primary research interests are microscopy, including super-resolution microscopy and photoacoustic microscopy, cost-effective high-performance optics for diagnostics, computational optical imaging, ultrafast imaging, and multidimensional optical imaging.  Dr. Liang Gao is the author of more than 30 peer-reviewed publications in top-tier journals, such as Nature, Physics Report, and Annual Review of Biomedical Engineering. He received his BS degree in Physics from Tsinghua University in 2005 and PhD degree in Applied Physics and Bioengineering from Rice University in 2011.