100 THz-bandwidth difference frequency generation at LaAlO3/SrTiO3 nanoscale junctions

ORAL

Abstract


We investigate the broadband nonlinear generation and detection capabilities of nanoscale junctions created at the LaAlO3/SrTiO3 interface using conductive AFM lithography. Using the large non-resonant third-order nonlinear susceptibility in SrTiO3, strong difference frequency mixing occurs when the junction is biased, leading to induced polarization that can also be detected at the junction (Ma et al, Nano Lett 13, 2884 (2013)). Here we characterize the bandwidth of the resulting THz emission, which appears to be bandwidth limited to about 100 THz for the 7 fs Ti:Sapphire laser pulse used. The ultrawide tunable bandwidth opens pathways for a new generation of THz spectroscopy on nanomaterials.

*This work is supported by the Office of Naval Research (N00014-16-1-3152), and the National Science Foundation Graduate Research Fellowship Program under Grant No. 1747452. The work at University of Wisconsin-Madison was supported by the National Science Foundation under DMREF Grant No. DMR-1629270, AFOS

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Presenters

  • Erin Sutton

    • University of Pittsburgh

Authors

  • Erin Sutton

    • University of Pittsburgh

  • Lu Chen

    • Univ of Pittsburgh
    • University of Pittsburgh
    • Physics, University of Pittsburgh

  • Jianan Li

    • Univ of Pittsburgh
    • University of Pittsburgh
    • Department of Physics and Astronomy, University of Pittsburgh

  • Hyungwoo Lee

    • University of Wisconsin-Madison
    • Univ of Wisconsin-Madison
    • University of Wisconsin
    • University of Wisconsin–Madison
    • Department of Materials Science and Engineering, University of Wisconsin-Madison
    • Physics, University of Wisconsin–Madison
    • Department of Materials Science and Engineering, University of Wisconsin - Madison

  • Jungwoo Lee

    • University of Wisconsin-Madison
    • Department of Materials Science and Engineering, University of Wisconsin-Madison
    • Department of Materials Science and Engineering, University of Wisconsin - Madison

  • Chang-Beom Eom

    • University of Wisconsin-Madison
    • Univ of Wisconsin-Madison
    • Univ of Wisconsin, Madison
    • Department of Material Science and Engineering, University of Wisconsin-Madison
    • Matls Sci & Eng, University of Wisconsin-Madison
    • University of Wisconsin
    • Department of Materials Science and Engineering, University of Wisconsin-Madison
    • University of Wisconsin–Madison
    • MS&E, University of Wisconsin
    • Physics, University of Wisconsin–Madison
    • Department of Materials Science and Engineering, University of Wisconsin - Madison

  • Jeremy Levy

    • Univ of Pittsburgh
    • Physics, Univ of Pittsburgh
    • University of Pittsburgh
    • Physics and Astronomy, University of Pittsburgh
    • Department of Physics and Astronomy, Univ of Pittsburgh
    • Department of Physics and Astronomy, University of Pittsburgh
    • Physics, University of Pittsburgh
    • Physics and Astronomy, Univ of Pittsburgh