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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 8 — Apr. 11, 2011
  • pp: 7726–7733

Direct imaging of nanogap-mode plasmon-resonant fields

Yoshito Tanaka, Hiroyasu Ishiguro, Hideki Fujiwara, Yukie Yokota, Kosei Ueno, Hiroaki Misawa, and Keiji Sasaki  »View Author Affiliations


Optics Express, Vol. 19, Issue 8, pp. 7726-7733 (2011)
http://dx.doi.org/10.1364/OE.19.007726


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Abstract

We perform direct local-field imaging of a plasmon-resonant gold nanoparticle pair separated by a gap of several nanometers using a scattering-type near-field optical microscope with a sharp silicon tip of atomic force microscope. The sharp tip allows the access for the nanogap and the high spatial resolution. Our results provide experimental evidence that the nanogap structure produces an optical spot with the size of a single nanometer (< 10 nm). This is not only of fundamental importance in the field of nanophotonics, but also provide significant information for the development of plasmonic devices with the nanogap structures.

© 2011 OSA

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(220.4241) Optical design and fabrication : Nanostructure fabrication
(180.4243) Microscopy : Near-field microscopy
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Optics at Surfaces

History
Original Manuscript: February 10, 2011
Revised Manuscript: March 10, 2011
Manuscript Accepted: March 29, 2011
Published: April 6, 2011

Citation
Yoshito Tanaka, Hiroyasu Ishiguro, Hideki Fujiwara, Yukie Yokota, Kosei Ueno, Hiroaki Misawa, and Keiji Sasaki, "Direct imaging of nanogap-mode plasmon-resonant fields," Opt. Express 19, 7726-7733 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-8-7726


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