Correlation between structural, optical, and electrical properties of self-assembled plasmonic nanostructures on the GaAs surface

  • Polina V. Gladskikh
  • Igor A. Gladskikh
  • Nikita A. Toropov
  • Mikhail A. Baranov
  • Tigran A. Vartanyan
Research Paper

Abstract

Self-assembled silver nanostructures on the industry-grade monocrystalline GaAs (100) wafer surface were obtained via physical vapor deposition and characterized by optical reflection spectroscopy, scanning electron microscopy, and current–voltage curve measurements. Reflection spectra of the samples with Ag equivalent thicknesses of 5, 7.5, and 10 nm demonstrated wide plasmonic bands in the visible range of spectra. Thermal annealing of the nanostructures led to narrowing of the plasmonic bands caused by major transformations of the film morphology. While the As prepared films predominantly had a small-scale labyrinth structure, after annealing well-separated silver nanoislands are formed on the gallium arsenide surface. A clear correlation between films morphology and their optical and electrical properties is elucidated. Annealing of the GaAs substrate with Ag nanostructures at 100 °C under control of the resistivity allowed us to obtain and fix the structure at the percolation threshold. It is established that the samples at the percolation threshold possess the properties of resistance switching and hysteresis.

Graphical Abstract

Keywords

Silver GaAs Optical properties Morphology Resistance switching Localized plasmon resonance 

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Copyright information

© Springer Science+Business Media Dordrecht 2015

Authors and Affiliations

  • Polina V. Gladskikh
    • 1
  • Igor A. Gladskikh
    • 1
  • Nikita A. Toropov
    • 1
  • Mikhail A. Baranov
    • 1
  • Tigran A. Vartanyan
    • 1
  1. 1.ITMO UniversitySaint PetersburgRussia

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