Over 100-THz Bandwidth Selective-Difference-Frequency Generation at LaAlO3/SrTiO3 Nanojunctions

ORAL

Abstract

The ability to combine continuously-tunable narrow-band terahertz (THz) generation that can access both far-infrared and mid-infrared regimes, with nanometer-scale spatial resolution, holds great potential for uncovering the underlying light-matter interactions as well as realizing selective control of rotational or vibrational resonances in nanoscale objects. Here, we report selective difference frequency generation with over 100 THz bandwidth through femtosecond optical pulse shaping. The THz emission is generated at nanoscale junctions at the interface of LaAlO3/SrTiO3 defined by conductive atomic force microscope lithography, with the potential to perform THz spectroscopy on individual nanoparticles or molecules. Numerical simulation of the time-domain signal helps to identify different contributing components for the THz generation. These results transform the LaAlO3/SrTiO3 interface into a promising platform for integrated lab-on-chip devices.

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Presenters

  • Lu Chen

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

Authors

  • Lu Chen

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

  • Erin Sutton

    Department of Physics and Astronomy, University of Pittsburgh

  • Hyungwoo Lee

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

  • Jungwoo Lee

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

  • Jianan Li

    Department of Physics and Astronomy, University of Pittsburgh, Department of Physics, University of Pittsburgh, University of Pittsburgh, Department of Physics & Astronomy, University of Pittsburgh, Physics and Astronomy, University of Pittsburgh

  • Chang-Beom Eom

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

  • Patrick Irvin

    Department of Physics and Astronomy, University of Pittsburgh, Department of Physics, University of Pittsburgh, University of Pittsburgh, Department of Physics & Astronomy, University of Pittsburgh, Physics and Astronomy, University of Pittsburgh

  • Jeremy Levy

    Department of Physics and Astronomy, University of Pittsburgh, Department of Physics, University of Pittsburgh, University of Pittsburgh, Department of Physics & Astronomy, University of Pittsburgh, Physics and Astronomy, University of Pittsburgh