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We describe a spin- and angle-resolved photoelectron spectroscopy (SARPES)apparatus with a vacuum-ultraviolet (VUV) laser ($h\nu$= 6.994 eV) developed atthe Laser and Synchrotron Research Center at the Institute for Solid StatePhysics, The University of Tokyo. The spectrometer consists of a hemisphericalphotoelectron analyzer equipped with an electron deflector function and twinvery-low-energy-electron-diffraction-type spin detectors, which allows us toanalyze the spin vector of a photoelectron three-dimensionally with both highenergy and angular resolutions. The combination of the high-performancespectrometer and the high-photon-flux VUV laser can achieve an energyresolution of 1.7 meV for SARPES. We demonstrate that the present laser-SARPESmachine realizes a quick SARPES on the spin-split band structure of a Bi(111)film even with 7 meV energy and 0.7$^\circ$ angular resolutions along theentrance-slit direction. This laser-SARPES machine is applicable to theinvestigation of spin-dependent electronic states on an energy scale of a fewmeV.

High-resolution three-dimensional spin- and angle-resolved photoelectron spectrometer using vacuum ultraviolet laser light