Low-loss impedance-matched optical metamaterials with zero-phase delay

Seokho Yun, Zhi Hao Jiang, Qian Xu, Zhiwen Liu, Douglas Henry Werner, Theresa S. Mayer

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

Metamaterials have dramatically expanded the range of available optical properties, enabling an array of new devices such as superlenses, perfect absorbers, and ultrafast switches. Most research has focused on demonstrating negative- and high-index metamaterials at terahertz and optical wavelengths. However, far less emphasis has been placed on low-loss near-zeroindex metamaterials that exhibit unique properties including quasi-infinite phase velocity and infinite wavelength. Here, we experimentally demonstrate a free-standing metallodielectric fishnet nanostructure that has polarization-insensitive, zero-index properties with nearly ideal transmission at 1.55 μm. This goal was achieved by optimizing the metamaterial geometry to allow both its effective permittivity and permeability to approach zero together, which simultaneously produces a zero index and matched impedance to free space. The ability to design and fabricate low-loss, near-zero-index optical metamaterials is essential for new devices such as beam collimators, zero-phase delay lines, and transformation optics lenses.

Original languageEnglish (US)
Pages (from-to)4475-4482
Number of pages8
JournalACS nano
Volume6
Issue number5
DOIs
StatePublished - May 22 2012

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Metamaterials
impedance
delay lines
collimators
Wavelength
phase velocity
wavelengths
Phase velocity
Electric delay lines
absorbers
permeability
switches
lenses
optics
permittivity
Lenses
Nanostructures
Optics
optical properties
Permittivity

All Science Journal Classification (ASJC) codes

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

Cite this

Yun, Seokho ; Jiang, Zhi Hao ; Xu, Qian ; Liu, Zhiwen ; Werner, Douglas Henry ; Mayer, Theresa S. / Low-loss impedance-matched optical metamaterials with zero-phase delay. In: ACS nano. 2012 ; Vol. 6, No. 5. pp. 4475-4482.
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Low-loss impedance-matched optical metamaterials with zero-phase delay. / Yun, Seokho; Jiang, Zhi Hao; Xu, Qian; Liu, Zhiwen; Werner, Douglas Henry; Mayer, Theresa S.

In: ACS nano, Vol. 6, No. 5, 22.05.2012, p. 4475-4482.

Research output: Contribution to journalArticle

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