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. Time and energy resolution are two important parameters which determine the range of possible measurements. We demonstrate tunable time and energy resolutions by adjusting the thickness of nonlinear BaB2O4 crystals commonly used to generate 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 and the National Defense Science and Engineering Graduate Fellowship.

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Presenters

  • Alexandre Gauthier

    • Geballe Laboratory for Advanced Materials, Stanford University

Authors

  • Alexandre Gauthier

    • Geballe Laboratory for Advanced Materials, Stanford University

  • Jonathan A Sobota

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

  • Nicolas Gauthier

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

  • Kejun Xu

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

  • Heike Pfau

    • Lawrence Berkeley National Laboratory

  • Costel R. Rotundu

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

  • Zhixun Shen

    • Standford
    • Stanford University
    • Stanford Univeristy
    • Applied Physics, Stanford University
    • SLAC National Accelerator Laboratory
    • Geballe Laboratory for Advanced Materials, Department of Applied Physics, Stanford University
    • Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
    • Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory
    • SIMES, SLAC - Natl Accelerator Lab
    • Stanford Univ

  • Patrick Kirchmann

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