Chirped imaging pulses in four-dimensional electron microscopy: femtosecond pulsed hole burning
The energy and time correlation, i.e. the chirp, of imaging electron pulses in dispersive propagation is measured by time-slicing (temporal hole burning) using photon-induced near-field electron microscopy. The chirp coefficient and the degree of correlation are obtained in addition to the duration of the electron pulse and its energy spread. Improving temporal and energy resolutions by time-slicing and energy-selection is discussed here and we explore their utility in imaging with time and energy resolutions below those of the generated ultrashort electron pulse. Potential applications for these imaging capabilities are discussed.
Additional Information© 2012 Institute of Physics. Authors, their institutions and third parties all have the same rights to reuse articles published in New Journal of Physics in accordance with the Creative Commons Attribution 3.0 Unported (CC-BY) license. Received 29 March 2012. Published 31 May 2012. This work was supported by the National Science Foundation and the Air Force Office of Scientific Research in the Physical Biology Center for Ultrafast Science and Technology (UST) supported by the Gordon and Betty Moore Foundation at Caltech. The authors would like to thank Drs J Spencer Baskin, Renske M van der Veen, and Ulrich Lorenz for helpful discussion, and Dr Anthony W Fitzpatrick for reading the manuscript carefully.
Published - Park2012p18660New_J._Phys.pdf
Supplemental Material - NJP428074suppdata.pdf