Skip to Content

Current Events

Center for High Energy Physics

More info will post here when it becomes available.

The Institute of Theoretical Science

More info will post here when it becomes available.

Oregon Center for Optical, Molecular and Quantum Science 

Special Seminar:

Tuesday, August 14, 2018
3:00 pm

472 Willamette (Institute of Theoretical Science conference room)

Host: Benjamin McMorran

Laura Clark
Dept. of Physics and Astronomy
Monash University, Australia.

“Remodelling electron optics for a modern imaging era

From their first demonstration, prior to WW2, the optical components in a transmission electron microscope have undergone huge developments over the last century, enabling imaging and diffraction at ever-higher resolution – particularly impacted by the successful implementation of aberration correctors over the last 10-15 years. Atomic resolution imaging of some types of specimen in vacuum is now routinely possible, while high-resolution in-situ imaging is heading in that direction.
High-resolution imaging of other categories of material remains challenging: contrast due to the subtle magnetic or longer-range electric fields in a sample is many orders of magnitude lower than the contrast due to the more-strongly scattering nuclei, and so is typically overwhelmed by noise. Many biological, or otherwise soft-matter specimens present the dual challenge of imparting only a small phase shift on the beam, while being easily damaged by a high-electron dose, limiting the resultant resolution.
In this presentation, I will discuss recent developments towards overcoming these challenges through introducing specific aberrations in the beam-forming optics (including creating electron vortex beams) in order to increase the recorded image contrast at a given electron dose, and the use of novel detector geometries to enable reliable measurements of specimen properties with improved resolution and accuracy.


Materials Science Institute 

More info will post here when it becomes available.

 UO Science Calendar

Physics Colloquium Series Preview

 Posts (most recent on home page):

Most recent Physics NewsletterLatest Issue

Past Newsletters

*Note: We are currently not producing any new hard-copy/print newsletters.  Information on news, press and events can be found on our main website.