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Metallic gyroids with broadband circular dichroism

Cumming, B.P., Schröder-Turk, G.E. and Gu, M. (2018) Metallic gyroids with broadband circular dichroism. Optics Letters, 43 (4). pp. 863-866.

Link to Published Version: https://doi.org/10.1364/OL.43.000863
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Abstract

Circular dichroism is a useful property for filtering or separating beams containing opposite spin angular momentum. Of the many geometries exhibiting circular dichroism, the gyroid has proven to be an excellent template for exploring circular dichroism in three dimensions. However, the bandwidth of the circular dichroism from dielectric gyroids is limited by its narrow circularly polarized stop band. Here we investigate conductive silver gyroid micro-structures using direct laser writing of polymeric templates followed by the electroless deposition of a uniform silver coating. We show that the transformation from dielectric to silver gyroid micro-structure can increase the circular dichroism bandwidth by close to a factor of 3

Publication Type: Journal Article
Murdoch Affiliation: School of Engineering and Information Technology
Publisher: OSA Publishing
Copyright: © 2018 Optical Society of America
URI: http://researchrepository.murdoch.edu.au/id/eprint/40356
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