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Optical properties of Au-core Pt-shell nanorods studied using FDTD simulations

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Abstract

Au-core/Pt-shell nanorods (Au@Pt NRs) have been prepared by a Au nanorod-mediated growth method, and they exhibit high electromagnetic field enhancements under coupling conditions. Boosted by a long-range effect of the high electromagnetic field generated by the Au core, the electromagnetic field enhancement can be controlled by changing the morphology of the nanostructures. In this study, we report the results on the simulations of the electromagnetic field enhancement using a finite difference time domain (FDTD) method, taking the real shapes of the Au@Pt NRs into account. Due to the “hot spot” effect, the electromagnetic field can be localized between the Pt nanodots. The electromagnetic field enhancement is found to be rather independent of the Pt content, whereas the local roughness and small sharp features might significantly modify the near-field. As the electromagnetic field enhancement can be tuned by the distribution of Pt nanodots over the Au-core, Au@Pt NRs can find potential applications in related areas.

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Authors and Affiliations

  1. College of Opto-electronic Engineering, Zaozhuang University, Zaozhuang, 277100, China

    Jian-Bo Liu, Yu-Shi Zhang, Yue-Ping Wang, Feng-Shou Liu, Wei-Yao Xu, Ming-Ji Zong & Lei Ma

  2. Zaozhuang Municipal Center for Disease Control and Prevention, Zaozhuang, 277100, China

    Lin Long

  3. CAS Key Laboratory of Standardization and Measurement for Nanotechnology, National Center for Nanoscience and Technology, Beijing, 100190, China

    Wen-Qi Liu, Hui Zhang, Jiao Yan, Jia-Qi Chen, Ying-Lu Ji & Xiao-Chun Wu

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  1. Jian-Bo Liu
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Correspondence to Jian-Bo Liu or Xiao-Chun Wu.

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Liu, JB., Long, L., Zhang, YS. et al. Optical properties of Au-core Pt-shell nanorods studied using FDTD simulations. Front. Phys. 11, 118501 (2016). https://doi.org/10.1007/s11467-015-0528-3

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  • DOI: https://doi.org/10.1007/s11467-015-0528-3

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