PHYSICS/BK21 Colloquium(09/5/8)

"  “Coherent X-ray Diffraction Imaging”
  

♦ Speaker : Prof. Do Young Noh [GIST]
♦ Place : Physics Seminar Room (Science Bldg, 3-201)
♦ Date & Time : May.  8(Fri)  4:00 ~ 5:00 pm
  

ØAbstract
  
Coherent x-rays generated from recent advanced x-ray sources such as next generation
synchrotrons  and  x-ray lasers  provide  new  opportunities to apply  x-rays in a similar
manner as visible laser beam. One of the most important applications of coherent x-rays
is the new microscopy  technique based on  static  coherent  diffraction  measurements.
The ultimate  resolution of this  diffraction  microscopy can be in sub-nanometer  scale.
In this presentation,  we introduce the principle of coherent diffraction imaging including
image reconstruction and phase retrieval.  In addition,  we present our recent results on
coherent x-ray diffraction imaging using hard x-rays, soft x-ray laser, and optical laser
beam. The impact of the future coherent  x-ray  imaging  would be  great  in  molecular
biology and nanoscience since the structural evolution of a specific molecule or a particle
can be followed in a proper time scale.
                
         Contact Person : Prof. Seung-Hoon Jhi (054-279-2094, jhish@postech.ac.kr)    
  "