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Nanometric holograms based on a topological insulator material

Journal Article


Abstract


  • Holography has extremely extensive applications in conventional optical instruments spanning optical microscopy and imaging, three-dimensional displays and metrology. To integrate holography with modern low-dimensional electronic devices, holograms need to be thinned to a nanometric scale. However, to keep a pronounced phase shift modulation, the thickness of holograms has been generally limited to the optical wavelength scale, which hinders their integration with ultrathin electronic devices. Here, we break this limit and achieve 60 nm holograms using a topological insulator material. We discover that nanometric topological insulator thin films act as an intrinsic optical resonant cavity due to the unequal refractive indices in their metallic surfaces and bulk. The resonant cavity leads to enhancement of phase shifts and thus the holographic imaging. Our work paves a way towards integrating holography with flat electronic devices for optical imaging, data storage and information security.

UOW Authors


  •   Yue, Zengji
  •   Xue, Gaolei (external author)
  •   Liu, Juan (external author)
  •   Wang, Yongtian (external author)
  •   Gu, Min (external author)

Publication Date


  • 2017

Citation


  • Yue, Z., Xue, G., Liu, J., Wang, Y. & Gu, M. (2017). Nanometric holograms based on a topological insulator material. Nature Communications, 8 15354-1-15354-5.

Scopus Eid


  • 2-s2.0-85019587340

Start Page


  • 15354-1

End Page


  • 15354-5

Volume


  • 8

Place Of Publication


  • United Kingdom

Abstract


  • Holography has extremely extensive applications in conventional optical instruments spanning optical microscopy and imaging, three-dimensional displays and metrology. To integrate holography with modern low-dimensional electronic devices, holograms need to be thinned to a nanometric scale. However, to keep a pronounced phase shift modulation, the thickness of holograms has been generally limited to the optical wavelength scale, which hinders their integration with ultrathin electronic devices. Here, we break this limit and achieve 60 nm holograms using a topological insulator material. We discover that nanometric topological insulator thin films act as an intrinsic optical resonant cavity due to the unequal refractive indices in their metallic surfaces and bulk. The resonant cavity leads to enhancement of phase shifts and thus the holographic imaging. Our work paves a way towards integrating holography with flat electronic devices for optical imaging, data storage and information security.

UOW Authors


  •   Yue, Zengji
  •   Xue, Gaolei (external author)
  •   Liu, Juan (external author)
  •   Wang, Yongtian (external author)
  •   Gu, Min (external author)

Publication Date


  • 2017

Citation


  • Yue, Z., Xue, G., Liu, J., Wang, Y. & Gu, M. (2017). Nanometric holograms based on a topological insulator material. Nature Communications, 8 15354-1-15354-5.

Scopus Eid


  • 2-s2.0-85019587340

Start Page


  • 15354-1

End Page


  • 15354-5

Volume


  • 8

Place Of Publication


  • United Kingdom