Over 100-THz bandwidth selective difference frequency generation at LaAlO<sub>3</sub>/SrTiO<sub>3</sub> nanojunctions

Lu Chen; Erin Sutton; Hyungwoo Lee; Jung-Woo Lee; Jianan Li; Chang-Beom Eom; Patrick Irvin; Jeremy Levy

doi:10.1038/s41377-019-0135-0

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Over 100-THz bandwidth selective difference frequency generation at LaAlO₃/SrTiO₃ nanojunctions

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- Over 100-THz bandwidth selective difference frequency generation at LaAlO₃/SrTiO₃ nanojunctions
- Light: Science & Applications Vol. 8, Issue 2, Pages: 261-267(2019)
- Affiliations：
  
  1.Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA, 15260, USA
  2.Pittsburgh Quantum Institute, Pittsburgh, PA, 15260, USA
  3.Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, WA, 53706, USA
- Author bio：
  
  Jeremy Levy (jlevy@pitt.edu)
- Funds：
- DOI：10.1038/s41377-019-0135-0
  CLC：
- Published：2019，
  
  Published Online：27 February 2019，
  
  Received：26 October 2018，
  
  Revised：01 February 2019，
  
  Accepted：02 February 2019
- Accepted：
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Chen, L. et al. Over 100-THz bandwidth selective difference frequency generation at LaAlO₃/SrTiO₃ nanojunctions. Light: Science & Applications, 8, 261-267 (2019).
DOI：

Chen, L. et al. Over 100-THz bandwidth selective difference frequency generation at LaAlO₃/SrTiO₃ nanojunctions. Light: Science & Applications, 8, 261-267 (2019). DOI： 10.1038/s41377-019-0135-0.

摘要

Abstract

The ability to combine continuously tunable narrow-band terahertz (THz) generation that can access both the far-infrared and mid-infrared regimes with nanometer-scale spatial resolution is highly promising for identifying underlying light-matter interactions and realizing selective control of rotational or vibrational resonances in nanoparticles or molecules. Here

we report selective difference frequency generation with over 100 THz

bandwidth via femtosecond optical pulse shaping. The THz emission is generated at nanoscale junctions at the interface of LaAlO

/SrTiO

(LAO/STO) that is 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 facilitates the identification of components that contribute to the THz generation. This ultra-wide-bandwidth tunable nanoscale coherent THz source transforms the LAO/STO interface into a promising platform for integrated lab-on-chip optoelectronic devices with various functionalities.

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references

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Over 100-THz bandwidth selective difference frequency generation at LaAlO3/SrTiO3 nanojunctions

DOI：10.1038/s41377-019-0135-0

摘要

Abstract

关键词

Keywords

references

Over 100-THz bandwidth selective difference frequency generation at LaAlO₃/SrTiO₃ nanojunctions