Plasmonic Lattice Lenses for Multiwavelength Achromatic Focusing

Jingtian Hu, Chang Hua Liu, Xiaochen Ren, Lincoln J. Lauhon, Teri W Odom

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

This paper describes an evolutionary approach to design flat multiwavelength achromatic lenses based on subwavelength plasmonic nanoparticles. Our lattice evolution algorithm achieved desired optical responses by tuning the arrangement of the phase units on a discrete square lattice. Lattice lenses consisting of a single type of nanoparticle could operate at any wavelength in the visible to near-infrared regime (540-1000 nm) by tailoring the localized surface plasmon resonance. When the unit cells were expanded to anisotropic particle shapes, the planar optics could selectively focus light depending on the polarization of incident light. Finally, the algorithm realized efficient multiobjective optimization and produced achromatic lattice lenses at up to three wavelengths (λ = 600 nm, λ = 785 nm, and λ = 980 nm) using multiple different nanoparticle shapes.

Original languageEnglish
Pages (from-to)10275-10282
Number of pages8
JournalACS Nano
Volume10
Issue number11
DOIs
Publication statusPublished - Nov 22 2016

Keywords

  • achromatic focusing
  • evolutionary algorithm
  • flat lenses
  • gold nanoparticles
  • metasurface
  • predictive design

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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