Tuning time and energy resolutions in time- and angle-resolved photoemission spectroscopy

ORAL

Abstract

Time- and angle-resolved photoemission is a powerful probe of nonequilibrium band structures, for which time and energy resolution are two important tuning parameters. We demonstrate tunable time and energy resolutions by adjusting the thickness of nonlinear BaB2O4 crystals generating 6 eV pulses from a 1.5 eV fundamental. We tune the time resolution between 58 and 103 fs and obtain corresponding energy resolutions of 55 to 27 meV, maintaining a time-bandwidth product under 150% of the Fourier limit. Calculations clarify the interactions between laser bandwidth and nonlinear crystal thickness which contribute to determining experimental resolutions.

*This work was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division. A.G. acknowledges support from the Stanford Graduate Fellowship.

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Presenters

  • Alexandre Gauthier

    • Stanford University
    • Geballe Laboratory for Advanced Materials, Stanford University

Authors

  • Alexandre Gauthier

    • Stanford University
    • Geballe Laboratory for Advanced Materials, Stanford University

  • Jonathan A Sobota

    • Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory

  • Nicolas Gauthier

    • Stanford University
    • Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory

  • Kejun Xu

    • Stanford Univ
    • Geballe Laboratory for Advanced Materials, Stanford University

  • Heike Pfau

    • Lawrence Berkeley National Laboratory
    • Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory

  • Costel R. Rotundu

    • Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory

  • Zhixun Shen

    • Stanford University
    • Stanford Univ
    • Stanford Institute for Materials and Energy Sciences, SLAC - Natl Accelerator Lab
    • Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory

  • Patrick S Kirchmann

    • SLAC - Natl Accelerator Lab
    • Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory