Metallic gyroids with broadband circular dichroism

Cumming, B, Schröder-Turk, G and Gu, M 2018, 'Metallic gyroids with broadband circular dichroism', Optics Letters, vol. 43, no. 4, pp. 863-866.

Document type: Journal Article
Collection: Journal Articles

Title Metallic gyroids with broadband circular dichroism
Author(s) Cumming, B
Schröder-Turk, G
Gu, M
Year 2018
Journal name Optics Letters
Volume number 43
Issue number 4
Start page 863
End page 866
Total pages 4
Publisher Optical Society of America
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.
Subject Optical Physics not elsewhere classified
Keyword(s) Butterfly Wing Scales
Photonic Crystals
DOI - identifier 10.1364/OL.43.000863
Copyright notice © 2018 Optical Society of America.
ISSN 0146-9592
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