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Issue 28, 2015
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Tunable mid IR plasmon in GZO nanocrystals

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Degenerate metal oxide nanoparticles are promising systems to expand the significant achievements of plasmonics into the infrared (IR) range. Among the possible candidates, Ga-doped ZnO nanocrystals are particularly suited for mid IR, considering their wide range of possible doping levels and thus of plasmon tuning. In the present work, we report on the tunable mid IR plasmon induced in degenerate Ga-doped ZnO nanocrystals. The nanocrystals are produced by a plasma expansion and exhibit unprotected surfaces. Tuning the Ga concentration allows tuning the localized surface plasmon resonance. Moreover, the plasmon resonance is characterized by a large damping. By comparing the plasmon of nanocrystal assemblies to that of nanoparticles dispersed in an alumina matrix, we investigate the possible origins of such damping. We demonstrate that it partially results from the self-organization of the naked particles and also from intrinsic inhomogeneity of dopants.

Graphical abstract: Tunable mid IR plasmon in GZO nanocrystals

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The article was received on 22 May 2015, accepted on 30 May 2015 and first published on 15 Jun 2015

Article type: Paper
DOI: 10.1039/C5NR03378K
Citation: Nanoscale, 2015,7, 12030-12037
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    Tunable mid IR plasmon in GZO nanocrystals

    M. K. Hamza, J.-M. Bluet, K. Masenelli-Varlot, B. Canut, O. Boisron, P. Melinon and B. Masenelli, Nanoscale, 2015, 7, 12030
    DOI: 10.1039/C5NR03378K

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