An ultrafast angle-resolved photoemission apparatus for measuring complex materials

We present technical specifications for a high resolution time- and angle-resolved photoemission spectroscopy setup based on a hemispherical electron analyzer and cavity-dumped solid state Ti:sapphire laser used to generate pump and probe beams, respectively, at 1.48 and 5.93 eV. The pulse repetition rate can be tuned from 209 Hz to 54.3 MHz. Under typical operating settings the system has an overall energy resolution of 23 meV, an overall momentum resolution of 0.003 angstrom(-1), and an overall time resolution of 310 fs. We illustrate the system capabilities with representative data on the cuprate superconductor Bi2Sr2CaCu2O8+delta. The descriptions and analyses presented here will inform new developments in ultrafast electron spectroscopy. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4772070]