Mid-Infrared Intersubband Absorption in Strain-Balanced Non-Polar (In)AlGaN/InGaN Multi-Quantum Wells

ORAL

Abstract

Strain-balanced non-polar m-plane (In)AlGaN/InGaN quantum wells are shown for the first time to exhibit mid-infrared intersubband absorption in the 3.4-5.1m range. A series of samples was grown using plasma assisted molecular beam epitaxy as an alternative to high Al-composition non-polar m-plane AlGaN/GaN quantum wells. The structural properties of the samples were determined using high resolution x-ray diffraction and transmission electron microanalysis. The experimental intersubband transition energy of each sample was measured using direct and attenuated total reflection Fourier transform infrared spectroscopy and compared to energies calculated using local-density and Hartree-Fock approximations. The effect of different material parameters such as quantum well width, barrier alloy, and charge density on the transition energy is explored to determine the potential of this material for practical applications.

*We acknowledge support from the National Science Foundation. TN, YC, and OM were supported in part by NSF awards DMR-1610893, and DMR-2004462. BD and AS acknowledge partial support from NSF award ECCS-1607173. All STEM imaging and analyses were performed at the Electron Microscopy Facility at Birck Nanotechnology Center, Purdue University.

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Publication: Trang Nguyen, Brandon Dzuba, Yang Cao, Alexander Senichev, Rosa E. Diaz, Michael J. Manfra, and Oana Malis, "Mid-infrared intersubband absorption in strain-balanced non-polar (In)AlGaN/InGaN multi-quantum wells," Opt. Mater. Express 11, 3284-3297 (2021)

Presenters

  • Trang Nguyen

    • Purdue University

Authors

  • Trang Nguyen

    • Purdue University

  • Oana Malis

    • Purdue University

  • Michael J Manfra

    • Department of Physics and Astronomy, Birck Nanotechnology Center, and Microsoft Quantum Lab Purdue, Purdue University
    • Purdue University
    • Purdue University, West Lafayette, Indiana 47907, USA

  • Brandon Dzuba

    • Purdue University

  • Yang Cao

    • Purdue University

  • Alexander Senichev

    • Purdue University

  • Rosa Diaz

    • Birck Nanotechnology Center