Speaker
Description
In this work we demonstrate the generation of a record low root mean square normalized transverse electron emittance of less than 30 pm-rad from a flat metal photocathode – more than an order of magnitude lower than the best the emittance that has been achieved from a flat photocathode. This was achieved by using plasmonic focusing of light to a sub-diffraction regime using plasmonic Archimedean spiral structures resulting in a ~40 nm root mean square electron emission spot. Such nanostructured electron sources exhibiting simultaneous spatio-temporal confinement to nanometer and femtosecond level along with a low mean transverse energy can be used for developing advanced electron sources to generate unprecedented electron beam brightness for various accelerator applications.
Funding Agency
This work is supported by the NSF Center for Bright Beams under award PHY-1549132. C.M.P. acknowledges US NSF Award PHY-1549132, the Center for Bright Beams and the US DOE SCGSR program.
| Region represented | North America |
|---|---|
| Paper preparation format | LaTeX |
