3D Janus plasmonic helical nanoapertures for polarization-encrypted data storage

Yang Chen; Xiaodong Yang; Jie Gao

doi:10.1038/s41377-019-0156-8

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3D Janus plasmonic helical nanoapertures for polarization-encrypted data storage

Article

- 3D Janus plasmonic helical nanoapertures for polarization-encrypted data storage
- Light: Science & Applications Vol. 8, Issue 3, Pages: 401-409(2019)
- Affiliations：
  
  Department of Mechanical and Aerospace Engineering, Missouri University of Science and Technology, Rolla, MO 65409, USA
- Author bio：
  
  Xiaodong Yang (yangxia@mst.edu)
  Jie Gao (gaojie@mst.edu)
- Funds：
- DOI：10.1038/s41377-019-0156-8
  CLC：
- Published：2019，
  
  Published Online：15 May 2019，
  
  Received：11 February 2019，
  
  Revised：16 April 2019，
  
  Accepted：24 April 2019
- Accepted：
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Chen, Y., Yang, X. D. & Gao, J. 3D Janus plasmonic helical nanoapertures for polarization-encrypted data storage. Light: Science & Applications, 8, 401-409 (2019).
DOI：

Chen, Y., Yang, X. D. & Gao, J. 3D Janus plasmonic helical nanoapertures for polarization-encrypted data storage. Light: Science & Applications, 8, 401-409 (2019). DOI： 10.1038/s41377-019-0156-8.

摘要

Abstract

Helical structures have attracted considerable attention due to their inherent optical chirality. Here

we report a unique type of 3D Janus plasmonic helical nanoaperture with direction-controlled polarization sensitivity

which is simply fabricated via the one-step grayscale focused ion beam milling method. Circular dichroism in transmission of as large as 0.72 is experimentally realized in the forward direction due to the spin-dependent mode coupling process inside the helical nanoaperture. However

in the backward direction

the nanoaperture acquires giant linear dichroism in transmission of up to 0.87. By encoding the Janus metasurface with the two nanoaperture enantiomers having specified rotation angles

direction-controlled polarization-encrypted data storage is demonstrated for the first time

where a binary quick-response code image is displayed in the forward direction under the circularly polarized incidence of a specified handedness

while a distinct grayscale image is revealed in the backward direction under linearly polarized illumination with a specified azimuthal angle. We envision that the proposed Janus helical nanoapertures will provide an appealing platform for a variety of applications

which will range from multifunctional polarization control

enantiomer sensing

data encryption and decryption to optical information processing.

关键词

Keywords

references

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