Comparison of the bandgaps of Ga-containing and Ga-free type II superlattices via photoluminescence measurements.

POSTER

Abstract

A 532 nm laser was used to obtain the photoluminescence spectra of GaSb/InAs and InAs/InAsSb type II superlattices at 5 K using a variety of power settings (10mW-2W). The main goal of these measurements was to obtain the bandgap of each investigated sample. The data was fit with a Gaussian/Voigt function. The maximum of the fitted curve corresponded to the bandgap of the sample. The bandgap energies of thee Ga-containing and Ga-free superlattices were then compared. Preliminary data suggests that while bandgap ranges were broader for Ga-free samples, indicating more defects, Ga-free materials are viable alternatives to Ga-containing materials for optical applications based on the intensity and consistency of their photo-response.

Authors

  • Logan Cordonnier

    Department of Physics, University of Dayton, Dayton, Ohio

  • Said Elhamri

    Department of Physics, University of Dayton, Dayton, Ohio, Department of Physics, University of Dayton, Dayton, OH 45469

  • Rudrakant Sollapur

    Miami University, The College of Wooster, University of Dayton, Ohio University and Argonne National Laboratory, Argonne National Laboratory, J. Stefen Inst., Slovenia, Ohio University, Institute of Physics, University of Belgrade, The University of Akron, Faculty of Physics, University of Belgrade, Institute for Multidisciplinary Research, University of Belgrade, Faculty of Sciences, University of Novi Sad, Bowling Green State University, Australian National University, Benet lab, Department of Physics and Electro-Optics Program University of Dayton, Dayton, OH 45469, Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ, Department of Physics, Arizona State University, Tempe, AZ, Electro-Optics Program, University of Dayton, Dayton, OH 45469, Department of Physics and Astronomy, Youngstown State University, University of Memphis, TN, Union College Barbourville, KY, Air Force Research Laboratory, Materials and Manufacturing Directorate, WPAFB, OH, Arizona State University, Materials and Manufacturing Directorate, Air Force Research Laboratory, WPAFB, OH 45433, Materials and Manufacturing Directorate, Wright-Patterson AFB, OH, Case Western Reserve University, Department of Electrical Engineering and Computer Science, Cleveland, OH, Air Force Research Lab, Materials and Manufacturing Directorate, WPAFB, OH, Ohio Northern Univ, University of Notre Dame, Miami Univ, Leibniz Institute of Photonic Technology e.V.; and Otto Schott Institute of Material Research, Abbe Center of Photonics, Leibniz Institute of Photonic Technology e.V., Institute of Optics and Quantum Electronics, Abbe Center of Photonics, Friedrich Schiller University; and Helmholtz Institute Jena, Institute of Optics and Quantum Electronics, Abbe Center of Photonics, Friedrich Schiller University

  • Rudrakant Sollapur

    Miami University, The College of Wooster, University of Dayton, Ohio University and Argonne National Laboratory, Argonne National Laboratory, J. Stefen Inst., Slovenia, Ohio University, Institute of Physics, University of Belgrade, The University of Akron, Faculty of Physics, University of Belgrade, Institute for Multidisciplinary Research, University of Belgrade, Faculty of Sciences, University of Novi Sad, Bowling Green State University, Australian National University, Benet lab, Department of Physics and Electro-Optics Program University of Dayton, Dayton, OH 45469, Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ, Department of Physics, Arizona State University, Tempe, AZ, Electro-Optics Program, University of Dayton, Dayton, OH 45469, Department of Physics and Astronomy, Youngstown State University, University of Memphis, TN, Union College Barbourville, KY, Air Force Research Laboratory, Materials and Manufacturing Directorate, WPAFB, OH, Arizona State University, Materials and Manufacturing Directorate, Air Force Research Laboratory, WPAFB, OH 45433, Materials and Manufacturing Directorate, Wright-Patterson AFB, OH, Case Western Reserve University, Department of Electrical Engineering and Computer Science, Cleveland, OH, Air Force Research Lab, Materials and Manufacturing Directorate, WPAFB, OH, Ohio Northern Univ, University of Notre Dame, Miami Univ, Leibniz Institute of Photonic Technology e.V.; and Otto Schott Institute of Material Research, Abbe Center of Photonics, Leibniz Institute of Photonic Technology e.V., Institute of Optics and Quantum Electronics, Abbe Center of Photonics, Friedrich Schiller University; and Helmholtz Institute Jena, Institute of Optics and Quantum Electronics, Abbe Center of Photonics, Friedrich Schiller University