Designing broadband plasmonic nanoantennas for ultrasensing

ORAL

Abstract

Various designs of broadband plasmonic nanoantennas made of gold and silver nanospheres are considered and optimized for ultrasensitive spectroscopic applications. The simulated nanostructures show a broadband optical response which may be tuned by varying the size, position and composition of nanospheres. Near-field enhancement in nanoantenna hot spots is analyzed and compared with previous literature results in the case of a fractal plasmonic nanolens. Broadband plasmonic nanoantennas may allow detecting ultrasmall concentrations of toxic materials and may be used for decoding DNA and for ultrafast nanophotonics applications.

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Authors

  • Zhenhuan Yi

    • Institute for Quantum Science and Engineering, Texas A\&M University, College Station, TX 77843

  • Kai Wang

    • Institute for Quantum Science and Engineering, Texas A\&M University, College Station, TX 77843

  • Dmitri V. Voronine

    • Institute for Quantum Science and Engineering, Texas A\&M University, College Station, TX 77843

  • Andrew Traverso

    • Institute for Quantum Science and Engineering, Texas A\&M University, College Station, TX 77843

  • Alexei Sokolov

    • Institute for Quantum Science and Engineering, Texas A\&M University, College Station, TX 77843