Designed ultrafast optical nonlinearity in a plasmonic nanorod metamaterial enhanced by nonlocality

G.A. Wurtz, Robert Pollard, William Hendren, G.P. Wiederrecht, D.J. Gosztola, V.A. Podolskiy, Anatoly Zayats

Research output: Contribution to journalArticle

334 Citations (Scopus)

Abstract

All-optical signal processing enables modulation and transmission speeds not achievable using electronics alone(1,2). However, its practical applications are limited by the inherently weak nonlinear effects that govern photon-photon interactions in conventional materials, particularly at high switching rates(3). Here, we show that the recently discovered nonlocal optical behaviour of plasmonic nanorod metamaterials(4) enables an enhanced, ultrafast, nonlinear optical response. We observe a large (80%) change of transmission through a subwavelength thick slab of metamaterial subjected to a low control light fluence of 7 mJ cm(-2), with switching frequencies in the terahertz range. We show that both the response time and the nonlinearity can be engineered by appropriate design of the metamaterial nanostructure. The use of nonlocality to enhance the nonlinear optical response of metamaterials, demonstrated here in plasmonic nanorod composites, could lead to ultrafast, low-power all-optical information processing in subwavelength-scale devices.
Original languageEnglish
Pages (from-to)106-110
Number of pages5
JournalNature Nanotechnology
Volume6
Issue number2
Early online date23 Jan 2011
DOIs
Publication statusPublished - Feb 2011

ASJC Scopus subject areas

  • Bioengineering
  • Biomedical Engineering
  • Materials Science(all)
  • Electrical and Electronic Engineering
  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics

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