Hybrid plasmonic Au-TiN vertically aligned nanocomposites: A nanoscale platform towards tunable optical sensing

Xuejing Wang, Jie Jian, Susana Diaz-Amaya, Cindy E. Kumah, Ping Lu, Jijie Huang, Daw Gen Lim, Vilas G. Pol, Jeffrey P. Youngblood, Alexandra Boltasseva, Lia A. Stanciu, Deirdre M. O'Carroll, Xinghang Zhang, Haiyan Wang

Research output: Contribution to journalArticlepeer-review

39 Scopus citations

Abstract

Tunable plasmonic structure at the nanometer scale presents enormous opportunities for various photonic devices. In this work, we present a hybrid plasmonic thin film platform: i.e., a vertically aligned Au nanopillar array grown inside a TiN matrix with controllable Au pillar density. Compared to single phase plasmonic materials, the presented tunable hybrid nanostructures attain optical flexibility including gradual tuning and anisotropic behavior of the complex dielectric function, resonant peak shifting and change of surface plasmon resonances (SPRs) in the UV-visible range, all confirmed by numerical simulations. The tailorable hybrid platform also demonstrates enhanced surface plasmon Raman response for Fourier-transform infrared spectroscopy (FTIR) and photoluminescence (PL) measurements, and presents great potentials as designable hybrid platforms for tunable optical-based chemical sensing applications.

Original languageEnglish (US)
Pages (from-to)1045-1054
Number of pages10
JournalNanoscale Advances
Volume1
Issue number3
DOIs
StatePublished - 2019

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • General Chemistry
  • Atomic and Molecular Physics, and Optics
  • General Materials Science
  • General Engineering

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