Broadband plasmonic microlenses based on patches of nanoholes

Hanwei Gao, Jerome K. Hyun, Min Hyung Lee, Jiun Chan Yang, Lincoln James Lauhon, Teri W Odom

Research output: Contribution to journalArticle

106 Scopus citations

Abstract

This paper reports a new type of diffractive microlens based on finite-areas of two-dimensional arrays of circular nanoholes (patches). The plasmonic microlenses can focus single wavelengths of light across the entire visible spectrum as well as broadband white light with little divergence. The focal length is determined primarily by the overall size of the patch and is tolerant to significant changes in patch substructure, including lattice geometry and local order of the circular nanoholes. The optical throughput, however, depends sensitively on the patch substructure and is determined by the wavelengths of surface plasmon resonances. This simple diffractive lens design enables millions of broadband plasmonic microlenses to be fabricated in parallel using soft nanolithographic techniques.

Original languageEnglish (US)
Pages (from-to)4111-4116
Number of pages6
JournalNano Letters
Volume10
Issue number10
DOIs
StatePublished - Oct 13 2010

Keywords

  • Surface plasmons
  • microlens arrays
  • nanohole arrays
  • plasmonic lenses
  • soft nanolithography

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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