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Direct observation of narrow mid-infrared plasmon linewidths of single metal oxide nanocrystals

Author

Listed:
  • Robert W. Johns

    (University of California
    The University of Texas at Austin, 200 East Dean Keeton Street, Austin, Texas 78712, USA)

  • Hans A. Bechtel

    (Advanced Light Source, Lawrence Berkeley National Laboratory)

  • Evan L. Runnerstrom

    (The University of Texas at Austin, 200 East Dean Keeton Street, Austin, Texas 78712, USA
    University of California)

  • Ankit Agrawal

    (The University of Texas at Austin, 200 East Dean Keeton Street, Austin, Texas 78712, USA)

  • Sebastien D. Lounis

    (The University of Texas at Austin, 200 East Dean Keeton Street, Austin, Texas 78712, USA
    Graduate Program in Applied Science and Technology, University of California)

  • Delia J. Milliron

    (The University of Texas at Austin, 200 East Dean Keeton Street, Austin, Texas 78712, USA)

Abstract

Infrared-responsive doped metal oxide nanocrystals are an emerging class of plasmonic materials whose localized surface plasmon resonances (LSPR) can be resonant with molecular vibrations. This presents a distinctive opportunity to manipulate light–matter interactions to redirect chemical or spectroscopic outcomes through the strong local electric fields they generate. Here we report a technique for measuring single nanocrystal absorption spectra of doped metal oxide nanocrystals, revealing significant spectral inhomogeneity in their mid-infrared LSPRs. Our analysis suggests dopant incorporation is heterogeneous beyond expectation based on a statistical distribution of dopants. The broad ensemble linewidths typically observed in these materials result primarily from sample heterogeneity and not from strong electronic damping associated with lossy plasmonic materials. In fact, single nanocrystal spectra reveal linewidths as narrow as 600 cm−1 in aluminium-doped zinc oxide, a value less than half the ensemble linewidth and markedly less than homogeneous linewidths of gold nanospheres.

Suggested Citation

  • Robert W. Johns & Hans A. Bechtel & Evan L. Runnerstrom & Ankit Agrawal & Sebastien D. Lounis & Delia J. Milliron, 2016. "Direct observation of narrow mid-infrared plasmon linewidths of single metal oxide nanocrystals," Nature Communications, Nature, vol. 7(1), pages 1-6, September.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms11583
    DOI: 10.1038/ncomms11583
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    Cited by:

    1. Michele Ghini & Nicola Curreli & Matteo B. Lodi & Nicolò Petrini & Mengjiao Wang & Mirko Prato & Alessandro Fanti & Liberato Manna & Ilka Kriegel, 2022. "Control of electronic band profiles through depletion layer engineering in core–shell nanocrystals," Nature Communications, Nature, vol. 13(1), pages 1-9, December.

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