4.6 Article

Spatial polarization sensitivity of single Au bowtie nanostructures

Journal

JOURNAL OF LUMINESCENCE
Volume 131, Issue 9, Pages 1971-1974

Publisher

ELSEVIER
DOI: 10.1016/j.jlumin.2011.04.001

Keywords

Surface plasmon; Photoluminescence; Au nanostructure

Categories

Funding

  1. National Natural Science Fund [60807027, 10990101, 91021014]
  2. National Education Ministry of China [109069]
  3. Research Fund for the Doctoral Program of Higher Education of China [200802691032]
  4. Shanghai Municipal Education Commission [09ZZ47]
  5. Ministry of Education, Culture, Sports, Science, and Technology of japan [19049001, 470]
  6. Hokkaido Innovation through Nanotechnology Support (HINTS)
  7. Grants-in-Aid for Scientific Research [23225006, 23686026] Funding Source: KAKEN

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Metallic bowtie nanostructures as plasmonic nanoantennas can create highly enhanced local fields when resonating with the incident light. With Au bowtie nanostructures fabricated by lithography method, we experimentally observed that the photoluminescence (PL) spatial profile from a single Au bowtie nanoantenna was strongly dependent on the excitation light polarization. While varying the incident light polarization, the spatial distribution of the PL intensity in the nanogap of an Au bowtie changed as predicted by the simulation results on the electromagnetic field enhancement distribution. The polarization feature of the PL intensity relative to the polarization direction of incident excitation light was also discussed. The study may find application in the design of polarization sensitive plasmonic sensors. (C) 2011 Elsevier B.V. All rights reserved.

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