In the first half of the lecture, I will introduce
biomedical applications based on the combination of light and sound. We have
developed a technique to manipulate light propagation in a biological sample,
especially the highly scattering medium. We generate non-linear acoustic waves
outside the sample and form a pressure gradient inside the sample to confine
the light against the scattering. In the second half of the lecture, I will
discuss the current state and prospects of high-speed imaging technology. The
interaction between acoustic waves and biological tissues occurs in extremely
short timeframes, but conventional technology has been unable to capture such
high-speed phenomena. To observe the phenomena directly, we have developed an
all-optical ultrafast imaging technique called STAMP (sequentially timed
all-optical mapping photography). I will present the principle of STAMP,
optical setups, and imaging results from femtosecond to nanosecond timescales.
报告人介绍
Keiichi Nakagawa received a Ph.D. degree in
engineering from The University of Tokyo in 2014. He is currently an Associate
Professor in the Department of Bioengineering and the Department of Precision
Engineering at the University of Tokyo, Japan. He also holds the position of a
FOREST Researcher at the Japan Science and Technology Agency as well as a
Visiting Scientist at RIKEN. He has been awarded the Young Scientists' Prize by
the Minister of Education, Culture, Sports, Science and Technology, Japan.
