Fine-tune the spectrum of indium-tin-oxide nanorod arrays in the visible range

Peijun Guo, Benjamin T. Diroll, John B. Ketterson, Richard D Schaller, Robert P. H. Chang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

All-optical modulation of light using metallic nanostructures can potentially enable processing of information with speed in the terahertz range. This is because the optical nonlinearity of metals dictated by the electron-phonon coupling is intrinsically fast. Nobel metals have achieved great success to this end due to their superior plasmonic properties in the visible. However, each type of noble metals only works in a specific wavelength range and therefore broadband spectral response covering the wide visible spectrum can be a challenge. Here we introduce indium-tin-oxide nanorod arrays (ITO-NRAs) which exhibit broadband response covering the visible spectrum. We show that the static spectral response of ITO-NRAs does not depend on the incident polarization and is insensitive to whether the lattice is a square or a rectangle. We further demonstrate that the transmission spectrum can be slightly shifted by changing the sample temperature, as well as adjusting the doping concentration which can be achieved by annealing the sample in oxygen rich environments. When pumped by an optical pulse with photon energy above the bandgap, the transmission can be modified in the entire visible range. These preliminary results show that ITONRAs offer unique opportunities for all-optical modulation in optical frequencies.

Original languageEnglish
Title of host publicationPlasmonics: Design, Materials, Fabrication, Characterization, and Applications XIV
PublisherSPIE
Volume9921
ISBN (Electronic)9781510602335
DOIs
Publication statusPublished - 2016
Event2016 SPIE Optics + Photonics Conference on Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XIV - San Diego, United States
Duration: Aug 28 2016Sep 1 2016

Other

Other2016 SPIE Optics + Photonics Conference on Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XIV
CountryUnited States
CitySan Diego
Period8/28/169/1/16

Keywords

  • All-optical modulation
  • Indium-tin-oxide
  • Nanorod
  • Tin-doped indium oxide
  • Visible spectrum

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Guo, P., Diroll, B. T., Ketterson, J. B., Schaller, R. D., & Chang, R. P. H. (2016). Fine-tune the spectrum of indium-tin-oxide nanorod arrays in the visible range. In Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XIV (Vol. 9921). [99211M] SPIE. https://doi.org/10.1117/12.2236163