Publications [#269802] of David R. Smith

Papers Published
  1. Hill, RT; Mock, JJ; Urzhumov, Y; Sebba, DS; Oldenburg, SJ; Chen, S-Y; Lazarides, AA; Chilkoti, A; Smith, DR, Leveraging nanoscale plasmonic modes to achieve reproducible enhancement of light., Nano Letters, vol. 10 no. 10 (October, 2010), pp. 4150-4154 [20804206], [doi] .

    The strongly enhanced and localized optical fields that occur within the gaps between metallic nanostructures can be leveraged for a wide range of functionality in nanophotonic and optical metamaterial applications. Here, we introduce a means of precise control over these nanoscale gaps through the application of a molecular spacer layer that is self-assembled onto a gold film, upon which gold nanoparticles (NPs) are deposited electrostatically. Simulations using a three-dimensional finite element model and measurements from single NPs confirm that the gaps formed by this process, between the NP and the gold film, are highly reproducible transducers of surface-enhanced resonant Raman scattering. With a spacer layer of roughly 1.6 nm, all NPs exhibit a strong Raman signal that decays rapidly as the spacer layer is increased.