Plasmonic field guided patterning of ordered colloidal nanostructures

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Abstract

Nano-patterned colloidal plasmonic metasurfaces are capable of manipulation of light at the subwavelength scale. However, achieving controllable lithography-free nano-patterning for colloidal metasurfaces still remains a major challenge, limiting their full potential in building advanced plasmonic devices. Here, we demonstrate plasmonic field guided patterning (PFGP) of ordered colloidal metallic nano-patterns using orthogonal laser standing evanescent wave (LSEW) fields. We achieved colloidal silver nano-patterns with a large area of 30 mm2 in <10 min by using orthogonal LSEW fields with a non-focused ultralow fluence irradiation of 0.25 W cm−2. The underlying mechanism of the formation of the nano-patterns is the light-induced polarization of the nanoparticles (NPs), which leads to a dipole-dipole interaction for stabilizing the nano-pattern formation, as confirmed by polarization-dependent surface-enhanced Raman spectroscopy. This optical field-directed self-assembly of NPs opens an avenue for designing and fabricating reconfigurable colloidal nano-patterned metasurfaces in large areas.
Original languageEnglish
Pages (from-to)505-512
JournalNanophotonics
Volume8
Issue number3
DOIs
Publication statusPublished - 21 Feb 2019

Keywords

  • ordered colloidal nanostructures
  • plasmonic field guided patterning
  • polarization stabilizing

ASJC Scopus subject areas

  • Biotechnology
  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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