title: Ultrafast Terahertz Gating of the Polarization and Giant Nonlinear Optical Response in BiFeO3 Thin Films.
abstract: Terahertz pulses are applied as an all-optical bias to ferroelectric thin-film BiFeO3 while monitoring the time-dependent ferroelectric polarization through its nonlinear optical response. Modulations in the intensity of the second harmonic light generated by the film correspond to on-off ratios of 220× gateable on femtosecond timescales. Polarization modulations comparable to the built-in static polarization are observed.
authors.affiliation: SIMES Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA.|Department of Electrical Engineering, Stanford University, Stanford, CA, 94305, USA.
authors.forename: Frank
authors.initials: F
authors.lastname: Chen
authors.affiliation: SIMES Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA.|Department of Materials Science and Engineering, Stanford University, Stanford, CA, 94305, USA.
authors.forename: John
authors.initials: J
authors.lastname: Goodfellow
authors.affiliation: The Makineni Theoretical Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, PA, 19104, USA.
authors.forename: Shi
authors.initials: S
authors.lastname: Liu
authors.affiliation: The Makineni Theoretical Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, PA, 19104, USA.
authors.forename: Ilya
authors.initials: I
authors.lastname: Grinberg
authors.affiliation: SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA.
authors.forename: Matthias C
authors.initials: MC
authors.lastname: Hoffmann
authors.affiliation: Department of Materials Science and Engineering, University of California, Berkeley, CA, 94720, USA.
authors.forename: Anoop R
authors.initials: AR
authors.lastname: Damodaran
authors.affiliation: Advanced Photon Source, Argonne National Laboratory, Lemont, IL, 60439, USA.
authors.forename: Yi
authors.initials: Y
authors.lastname: Zhu
authors.affiliation: SIMES Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA.
authors.forename: Peter
authors.initials: P
authors.lastname: Zalden
authors.affiliation: Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA.
authors.forename: Xiaohang
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA.
authors.forename: Ichiro
authors.initials: I
authors.lastname: Takeuchi
authors.affiliation: The Makineni Theoretical Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, PA, 19104, USA.
authors.forename: Andrew M
authors.initials: AM
authors.lastname: Rappe
authors.affiliation: Department of Materials Science and Engineering, University of California, Berkeley, CA, 94720, USA.|Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.
authors.forename: Lane W
authors.initials: LW
authors.lastname: Martin
authors.affiliation: Advanced Photon Source, Argonne National Laboratory, Lemont, IL, 60439, USA.
authors.forename: Haidan
authors.initials: H
authors.lastname: Wen
authors.affiliation: SIMES Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA.|Department of Materials Science and Engineering, Stanford University, Stanford, CA, 94305, USA.|PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA.
authors.forename: Aaron M
authors.initials: AM
authors.lastname: Lindenberg
keywords: ferroelectrics; nonlinear optical properties; terahertz modulators; ultra-fast