PACKED COLLOIDAL SPHERES FOR THIN FILM STRUCTURATION; TOWARDS MODULATION AND TUNABILITY OF SURFACE PLASMON RESONANCE

  • BERCEA ADRIAN
    Univ. Limoges, CNRS, IRCER, UMR 7315, F-87000 Limoges, France
  • CONSTANTINESCU CATALIN
    Univ. Limoges, CNRS, IRCER, UMR 7315, F-87000 Limoges, France
  • DUMAS-BOUCHIAT FREDERIC
    Univ. Limoges, CNRS, IRCER, UMR 7315, F-87000 Limoges, France
  • CHAMPEAUX CORINNE
    Univ. Limoges, CNRS, IRCER, UMR 7315, F-87000 Limoges, France

Abstract

This work is devoted to present developments of metallic triangular
nano/micropatterns arrays based on self-assembly of closely packed colloidal polystyrene
microspheres, using a combination of colloidal lithography and Pulsed Laser Deposition
(PLD) process. Au and Ir metal triangular structures with thicknesses of 50 - 100 nm,
directly fabricated on Al2O3 or embedded in a VO2 matrix have been studied in order to
tune the position and intensity of localized surface plasmon resonances (LSPR). The
position of the LSPR depends strongly of the size and the shape of the metallic patterns, the
spacing between them and the surrounding dielectric environment.

Cuvinte cheie

LSPR PLD Colloidal lithography Au and Ir LSPR vanadium dioxide.