Nanofocusing in a metal-insulator-metal gap plasmon waveguide with a three-dimensional linear taper

Hyuck Choo, Myung-Ki Kim, Matteo Staffaroni, Tae Joon Seok, Jeffrey Bokor, Stefano Cabrini, P. James Schuck, Ming C. Wu, Eli Yablonovitch

Research output: Contribution to journalArticle

226 Citations (Scopus)

Abstract

The development of techniques for efficiently confining photons on the deep sub-wavelength spatial scale will revolutionize scientific research and engineering practices. The efficient coupling of light into extremely small nanofocusing devices has been a major challenge in on-chip nanophotonics because of the need to overcome various loss mechanisms and the on-chip nanofabrication challenges. Here, we demonstrate experimentally the achievement of highly efficient nanofocusing in an Au-SiO 2 -Au gap plasmon waveguide using a carefully engineered three-dimensional taper. The dimensions of the SiO 2 layer, perpendicular to the direction of wave propagation, taper linearly below 100 nm. Our simulations suggest that the three-dimensional linear-tapering approach could focus 830 nm light into a 2 × 5 nm 2 area with ≤3 dB loss and an intensity enhancement of 3.0 × 10 4. In a two-photon luminescence measurement, our device achieved an intensity enhancement of 400 within a 14 × 80 nm 2 area, and a transmittance of 74%.

Original languageEnglish
Pages (from-to)838-844
Number of pages7
JournalNature Photonics
Volume6
Issue number12
DOIs
Publication statusPublished - 2012 Dec 1
Externally publishedYes

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tapering
Waveguides
Photons
Metals
insulators
waveguides
Nanophotonics
chips
Nanotechnology
metals
Wave propagation
Luminescence
augmentation
nanofabrication
photons
confining
Wavelength
wave propagation
transmittance
engineering

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

Cite this

Choo, H., Kim, M-K., Staffaroni, M., Seok, T. J., Bokor, J., Cabrini, S., ... Yablonovitch, E. (2012). Nanofocusing in a metal-insulator-metal gap plasmon waveguide with a three-dimensional linear taper. Nature Photonics, 6(12), 838-844. https://doi.org/10.1038/nphoton.2012.277

Nanofocusing in a metal-insulator-metal gap plasmon waveguide with a three-dimensional linear taper. / Choo, Hyuck; Kim, Myung-Ki; Staffaroni, Matteo; Seok, Tae Joon; Bokor, Jeffrey; Cabrini, Stefano; Schuck, P. James; Wu, Ming C.; Yablonovitch, Eli.

In: Nature Photonics, Vol. 6, No. 12, 01.12.2012, p. 838-844.

Research output: Contribution to journalArticle

Choo, H, Kim, M-K, Staffaroni, M, Seok, TJ, Bokor, J, Cabrini, S, Schuck, PJ, Wu, MC & Yablonovitch, E 2012, 'Nanofocusing in a metal-insulator-metal gap plasmon waveguide with a three-dimensional linear taper', Nature Photonics, vol. 6, no. 12, pp. 838-844. https://doi.org/10.1038/nphoton.2012.277
Choo, Hyuck ; Kim, Myung-Ki ; Staffaroni, Matteo ; Seok, Tae Joon ; Bokor, Jeffrey ; Cabrini, Stefano ; Schuck, P. James ; Wu, Ming C. ; Yablonovitch, Eli. / Nanofocusing in a metal-insulator-metal gap plasmon waveguide with a three-dimensional linear taper. In: Nature Photonics. 2012 ; Vol. 6, No. 12. pp. 838-844.
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