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Proceedings Article

Cylindrical channel plasmon resonance for single-molecule sensing

[+] Author Affiliations
Brandon Terranova, Alyssa A. Bellingham, Sylvia Herbert, Adam K. Fontecchio

Drexel Univ. (United States)

Proc. SPIE 8994, Photonic and Phononic Properties of Engineered Nanostructures IV, 899413 (February 19, 2014); doi:10.1117/12.2040565
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From Conference Volume 8994

  • Photonic and Phononic Properties of Engineered Nanostructures IV
  • Ali Adibi; Shawn-Yu Lin; Axel Scherer
  • San Francisco, California, United States | February 01, 2014

abstract

Quasi-3D nanoplasmonic structures are investigated, and the interaction of cavity and surface plasmon modes in Au cylindrical channels is discussed. By fastidious choice of geometrical parameters, it is shown that localized surface plasmon resonances (LSPR) inside the channels are established and are highly sensitive to changes in the local dielectric environment. In this study, cylindrical channels are added to the surface of gold nanopillars whose geometry otherwise permits LSPR. The inclusion of the channels creates a plasmonic waveguide supporting whispering gallery mode (WGM) cylindrical channel plasmons, which result from the coupled hybridized field. FDTD simulations reveal the possibility of single-molecule sensitivity of these cylindrical channel nanopillars (CCNP) by demonstrating near-IR wavelength shifts in the detected reflectance from a modeled array of CCNPs in various dielectric environments. The reported sensitivity of this metamaterial provides a platform for SPR single-molecule studies and exhibits potential for label-free biological and chemical sensing. © (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation

Brandon Terranova ; Alyssa A. Bellingham ; Sylvia Herbert and Adam K. Fontecchio
" Cylindrical channel plasmon resonance for single-molecule sensing ", Proc. SPIE 8994, Photonic and Phononic Properties of Engineered Nanostructures IV, 899413 (February 19, 2014); doi:10.1117/12.2040565; http://dx.doi.org/10.1117/12.2040565


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