Nanoscale Photodetection in LaAlO3/KTaO3 Heterostructures

ORAL

Abstract

Nanoscale photodetectors based on semiconductor heterostructures show promise for high-performance, miniaturized optical sensors [1]. Here we report the development of a rewritable nanoscale photodetector created at the interface between LaAlO3 and KTaO3. An optoelectronic detection platform is created by writing nanojunctions in the scale of a few nanometers using a reversible conductive atomic force microscope writing technique [2][3]. Our work provides a pathway towards ultrasensitive photodetection in the nanoscale while paving the way for novel optoelectronic devices and applications.

[1] P. Irvin, et al., Nature Photonics volume 4 (2010)

[1] C. Cen, et al., Nature Materials 7, 298 (2008).

[2] M. Yu et al., Nano Lett. 2022, 22, 15, 6062–6068

* JL acknowledges support from ONR N00014-20-1-2481. JL and CBE acknowledge ONR MURI N00014-21-1-2437. JL and PI acknowledge support from DOE-QIS. C.-B.E. acknowledges support from the Gordon and Betty Moore Foundation's EPiQS Initiative (grant GBMF9065) and the Vannevar Bush Faculty Fellowship (ONR N00014-20-1-2844). Transport measurement at the University of Wisconsin–Madison was supported by the US Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences (BES), under award number DE-FG02-06ER46327.

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Presenters

  • Pubudu G Wijesinghe

    University of Pittsburgh

Authors

  • Pubudu G Wijesinghe

    University of Pittsburgh

  • Melanie Dieterlen

    University of Pittsburgh

  • Muqing Yu

    University of Pittsburgh

  • Jieun Kim

    University of Wisconsin - Madison

  • Chang-Beom Eom

    University of Wisconsin-Madison, Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA, University of wisconsin-madison, Department of Materials Science and Engineering, University of Wisconsin-Madison, Wisconsin 53706, USA

  • Patrick Irvin

    University of Pittsburgh, Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260, USA

  • Jeremy Levy

    University of Pittsburgh, Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260, USA