Original Article

Citation: Light: Science & Applications (2017) 6, e16192; doi:10.1038/lsa.2016.192
Published online 13 January 2017

Bragg-mirror-like circular dichroism in bio-inspired quadruple-gyroid 4srs nanostructures
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Benjamin P Cumming1,2, Gerd E Schröder-Turk3, Sukanta Debbarma4 and Min Gu1,2

  1. 1Laboratory of Artificial-Intelligence Nanophotonics and CUDOS, School of Science, RMIT University, Melbourne, Victoria 3001, Australia
  2. 2Centre for Micro-Photonics, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia
  3. 3School of Engineering and Information Technology, Mathematics and Statistics, Murdoch University, Murdoch, Western Australia 6150, Australia
  4. 4Laser Physics Centre and CUDOS, Research School of Physical Sciences and Engineering, Australian National University, Canberra, Australian Capital Territory 2601, Australia

Correspondence: M Gu, Email: min.gu@rmit.edu.au

Received 5 April 2016; Revised 11 July 2016; Accepted 18 July 2016
Accepted article preview online 3 June 2016

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Abstract

The smooth and tailorable spectral response of Bragg mirrors has driven their pervasive use in optical systems requiring customizable spectral control of beam propagation. However, the simple nature of Bragg mirror reflection prevents their application to the control of important polarization states such as circular polarization. While helical and gyroid-based nanostructures exhibiting circular dichroism have been developed extensively to address this limitation, they are often restricted by the spectral inconsistency of their optical response. Here we present the fabrication and characterization of quadruple-gyroid 4srs nanostructures exhibiting bio-inspired Bragg-mirror-like circular dichroism: a smooth and uniform band of circular dichroism reminiscent of the spectrum of a simple multilayer Bragg-mirror. Furthermore, we demonstrate that the circular dichroism produced by 4srs nanostructures are robust to changes in incident angle and beam collimation, providing a new platform to create and engineer circular dichroism for functional circular polarization manipulation.

Keywords:

Bio-inspired; Bragg-mirror; Chirality; Circular dichroism; Gyroid