Nanometric holograms based on a topological insulator material

Yue, Z, Xue, G, Liu, J, Wang, Y and Gu, M 2017, 'Nanometric holograms based on a topological insulator material', Nature Communications, vol. 8, 15354, pp. 1-5.


Document type: Journal Article
Collection: Journal Articles

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Title Nanometric holograms based on a topological insulator material
Author(s) Yue, Z
Xue, G
Liu, J
Wang, Y
Gu, M
Year 2017
Journal name Nature Communications
Volume number 8
Article Number 15354
Start page 1
End page 5
Total pages 4
Publisher Nature
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.
Subject Photonics, Optoelectronics and Optical Communications
Keyword(s) Imaging and sensing
interfaces and thin films
Nanophotonics and plasmonics
Surfaces
Topological insulators
DOI - identifier 10.1038/ncomms15354
Copyright notice © The Author(s) 2017. This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
ISSN 2041-1723
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