The Effect of Nanostructure on Near-Infrared Absorption in M-Plane AlGaN/(In)GaN Heterostructures

ORAL

Abstract

Near infrared intersubband (ISB) absorption of nonpolar AlxGa1-xN/(In)GaN is studied due to its broad potential applications into optoelectronic devices. Above 60% Al-composition, m-plane AlGaN alloy becomes kinetically unstable during the plasma-assisted molecular beam epitaxy growth generating unique nanostructures. The nanostructures are imaged with energy dispersive x-ray spectroscopy and scanning transmission electron microscopy. They consist of platforms of higher than expected Al-composition and islands of lower Al-composition AlGaN. We discuss the consequences of these nanostructures on ISB absorption energy and linewidth. We are also investigating strain-balanced AlxGa1-xN/InGaN (x<0.6) as an alternative to AlxGa1-xN/GaN (x>0.6).

*We acknowledge support from the National Science Foundation. MS-HD was supported in part by NSF award DMR-1610893. TN, YC, and OM acknowledge partial support from NSF grant ECCS-1253720. AS and BD was supported from NSF award ECCS-1607173.

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Presenters

  • Trang Nguyen

    • Purdue University
    • Physics and Astronomy, Purdue University

Authors

  • Trang Nguyen

    • Purdue University
    • Physics and Astronomy, Purdue University

  • MohammadAli Shirazi-Hosseini-Dokht

    • Purdue University
    • Physics and Astronomy, Purdue University

  • Yang Cao

    • Purdue University
    • Physics and Astronomy, Purdue University

  • Alexander Senichev

    • Purdue University
    • Birck Nano Technology Center, Purdue University

  • Brandon Dzuba

    • Purdue University
    • Physics and Astronomy, Purdue University

  • Rosa Diaz

    • Purdue University
    • Birck Nano Technology Center, Purdue University
    • Birck Nanotechnology Center, Purdue University

  • Geoffrey Gardner

    • Department of Physics and Astronomy, Purdue University
    • Purdue University
    • Birck Nano Technology Center, Purdue University
    • Dept. of Physics, Purdue University
    • Department of Physics and Astronomy and Station Q Purdue, Purdue University
    • Department of Physics and Astronomy, Station Q Purdue, and Birck Nanotechnology Center, Purdue University

  • Oana Malis

    • Purdue University
    • Physics and Astronomy, Purdue University

  • Michael Manfra

    • Purdue University
    • Microsoft
    • Department of Physics and Astronomy and Station Q Purdue, Purdue University
    • Department of Physics and Astronomy, Purdue University
    • Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907 USA
    • Microsoft Station Q Purdue
    • Physics and Astronomy, Purdue University
    • Department of Physics and Astronomy, School of Materials Engineering and School of Electrical and Computer Engineering, Purdue University
    • Station Q Purdue and Department of Physics and Astronomy, Purdue University
    • Dept. of Physics, Purdue University
    • Department of Physics and Astronomy and Station Q Purdue, Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, USA
    • Dept. of Physics and Astronomy, Purdue
    • Purdue University, Station Q Purdue
    • Department of Physics and Astronomy, Station Q Purdue, and Birck Nanotechnology Center, Purdue University