skip to main content

DOE PAGESDOE PAGES

Title: Sensing Properties of a Fabry-Perot Dielectric Structure and Dimer Nanoparticles

We investigate the use of a Fabry-Perot dielectric structure combined with differently shaped nanoparticles for Surface Enhanced Raman Scattering. In particular, we show how an ideal two-layer Fabry-Perot configuration enhances the local surface field of silver nanoparticles positioned on the surface of the structure. We develop the concept using disc dimers and then extend the discussion to bowtie nanoparticles. The structure is excited by a single emitter, which couples to the nanoparticles through the dielectric layers, producing a wide aperture field that can be used to excite multiple dimers. We show how an array of nanoparticles can be properly arranged in order to increase the total scattering signal generated from the structure. The layered geometry produces robust field properties in between nanoparticles, making the overall sensing characteristics less sensitive to the interparticle seperation distance and incident polarization.
Authors:
 [1] ;  [1]
  1. Department of Chemistry, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA
Publication Date:
OSTI Identifier:
1280205
Grant/Contract Number:
SC0006922
Type:
Published Article
Journal Name:
Journal of Nanotechnology
Additional Journal Information:
Journal Volume: 2012; Related Information: CHORUS Timestamp: 2016-08-02 18:20:45; Journal ID: ISSN 1687-9503
Publisher:
Hindawi Publishing Corporation
Sponsoring Org:
USDOE
Country of Publication:
Egypt
Language:
English