Nonlinear Plasmon, Rayleigh Scattering and Terahertz Dynamics in Phase-Change Correlated Oxides

Abstract

The major research objectives of this project are to investigate fundamental processes in ultrafast light-induced insulator-to-metal (I-M) and metal-to-insulator phase transition (M-I PT) dynamics in correlated vanadium oxides and elucidate the evolution of nonequilibrium phases upon photoexcitation. Different single-layer epitaxial films, multilayer plasmonic structures and also several phase-change oxide heterostructures will be synthesized during the program. The research effort is organized into three separate thrust areas: (1) Synthesis of vanadium oxide thin films and complex multilayer structures (2) Time- and angle-resolved hemispherical elastic light scattering and surface plasmon-polariton (SPP) spectroscopy of photoexcited oxides (3) Time-domain terahertz spectroscopy The synthesis of a broad range of phase-change oxides, including highly nonlinear VO2, V2O3 complexes, is one of the major goals of the project. Pulsed laser deposition (PLD) and pulsed-dc magnetron sputtering techniques will be applied to prepare thin epitaxial and non-epitaxial films. While the main research focus of the project is centered on VO2 and V2O3 oxides, we also focus on the development of reliable protocols for the fabrication of V6O13, V3O5, V4O7, V5O9 and V6O11. The study of light-induced PT dynamics is applied for all successfully synthesized oxides. We note that the light-induced PT in V3O5, V4O7, V5O9, V6O11, V6O13 was never studied before and it is a completely unexplored phenomenon for these oxides. In order to elucidate pathways of excited state dynamics in vanadium oxide complexes, the research focuses on ultrafast light-induced PT dynamics in oxides with different stoichiometries and morphologies. Different methods of femtosecond spectroscopy will help to separate the charge and lattice dynamics upon PT and to reconstruct the evolution of electronic and structural material properties.

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Document Details

Document Type
Technical Report
Publication Date
Nov 30, 2019
Accession Number
AD1095528

Entities

People

  • Félix E Fernández
  • Sergiy Lysenko

Organizations

  • University of Puerto Rico at Mayaguez

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Band Structures
  • Computational Science
  • Diffraction
  • Energy Bands
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Optical Phenomena
  • Optical Properties
  • Optics
  • Phase Transformations
  • Physics Laboratories
  • Scattering
  • Subatomic Particles
  • Surface Plasmon Polaritons
  • Transition Temperature
  • Wave Mixing

Fields of Study

  • Physics

Readers

  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.
  • Thin Film Deposition Science.

Technology Areas

  • Directed Energy
  • Directed Energy - Pulsed-Laser Deposition
  • Microelectronics
  • Microelectronics - Graphene