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Optical transmission enhacement through chemically tuned two-dimensional bismuth chalcogenide nanoplates

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  • Jie Yao

    (Stanford University
    Present address: Department of Materials Science and Engineering, University of California, Berkeley, California 94720, USA)

  • Kristie J. Koski

    (Stanford University)

  • Weidong Luo

    (Stanford University)

  • Judy J. Cha

    (Stanford University)

  • Liangbing Hu

    (Stanford University)

  • Desheng Kong

    (Stanford University)

  • Vijay Kris Narasimhan

    (Stanford University)

  • Kaifu Huo

    (Stanford University)

  • Yi Cui

    (Stanford University
    Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory)

Abstract

Layer-structured two-dimensional nanomaterials are a family of materials with strong covalent bonding within layers and weak van der Waals interaction between layers, whose vertical thickness can be thinned down to few nanometer and even single atomic layer. Bismuth chalcogenides are examples of such two-dimensional materials. Here, we present our discovery of significant enhancement of light transmission through thin nanoplates of layered bismuth chalcogenides by intercalation of copper atoms, which is on the contrary to most bulk materials in which doping reduces the light transmission. This surprising behaviour results from two mechanisms: chemical tuning effect of substantial reduction of material absorption after intercalation and nanophotonic effect of zero-wave anti-reflection unique to ultra-small thickness of nanoplates. We demonstrate that the synergy of these two effects in two-dimensional nanostructures can be exploited for various optoelectronic applications including transparent electrode. The intercalation mechanism allows potential dynamic tuning capability.

Suggested Citation

  • Jie Yao & Kristie J. Koski & Weidong Luo & Judy J. Cha & Liangbing Hu & Desheng Kong & Vijay Kris Narasimhan & Kaifu Huo & Yi Cui, 2014. "Optical transmission enhacement through chemically tuned two-dimensional bismuth chalcogenide nanoplates," Nature Communications, Nature, vol. 5(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms6670
    DOI: 10.1038/ncomms6670
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