Conveners
Session 9: Theory and Computation
- Kevin Jensen (Naval Research Laboratory)
Progress in attosecond science in the past decade has enabled the study of ultrafast electronic
processes with unprecedented temporal resolution [1]. We extended an interferometric two-photon
technique named RABBITT [2] based on attosecond XUV pump pulses and a phase-matched IR probe
field from gas phase to solid surfaces to study the dynamics of the photoelectric effect [3].
Experiments on...
In calculating materials properties, a density-functional theory (DFT) has come to represent many functional theories, as well as many-body concepts that go beyond ground-state and density-dependent properties. The average practitioner should be aware of the complexion of DFT. We will outline the modern usage of DFT and its applicability to Alkali Antimonides; specifically, the density of...
Measurements of the spectral dependence of the mean transverse energy (MTE) from single crystal Mo(100) and W(100) photocathodes display a non-uniform increase with excess photoemission energy. The observed behavior is attributed to the bulk electronic band structure of the emitting states in the Γ-H direction of these body-centered cubic (bcc) metal crystals; specifically, the influence of...
Many applications, such as compact accelerators and electron microscopy, demand high
brightness electron beams with small source size and ultra-low-emittance. Diamond emitters
manufactured from the semiconductor process can be employed as such a compact beam source.
The micron-scale pyramid structure of the emitter allows enhancement of the external field
compared to that at the substrate,...