Over 100-THz Bandwidth Selective-Difference-Frequency Generation at LaAlO<sub>3</sub>/SrTiO<sub>3</sub> 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.
*JL acknowledges support from ONR (N00014-16-1-3152) and a Vannevar Bush Faculty Fellowship, funded by ONR (N00014-15-1-2847). C-BE acknowledges support from AFOSR (FA9550-15-1-0334), NSF DMREF (DMR-1629270), and NSF MRSEC (DMR-1420645) (C-BE). ES acknowledges support from the NSF Graduate Research Fellowship Program (1747452).
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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
