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Open AccessArticle

Au Nanospirals Transferred onto PDMS Film Exhibiting Circular Dichroism at Visible Wavelengths

Department of Mechanical and Intelligent Systems Engineering, Graduate School of Informatics and Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu-City, Tokyo 182-8585, Japan
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Micromachines 2020, 11(7), 641; https://doi.org/10.3390/mi11070641
Received: 31 May 2020 / Revised: 25 June 2020 / Accepted: 26 June 2020 / Published: 29 June 2020
We propose a thin, single-layered circular dichroic filter with Au nanospiral structures on a polydimethylsiloxane (PDMS) thin film that has strong circular dichroism at visible wavelengths. Au nanospiral structures with a diameter of 70 nm were fabricated by cryogenic glancing angle deposition on a substrate with a nanodot array template patterned with the block copolymer PS-PDMS. The Au nanospiral structures were transferred onto a transparent and flexible PDMS thin film to fabricate a thin, single-layered circular dichroic filter. The filter had a very large circular dichroism peak of −830 mdeg at 630 nm. The results show that the Au nanospiral structures transferred onto PDMS thin film exhibit large circular dichroism at visible wavelengths. View Full-Text
Keywords: circular dichroism; metamaterial; chirality; optical filter circular dichroism; metamaterial; chirality; optical filter
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Furusawa, G.; Kan, T. Au Nanospirals Transferred onto PDMS Film Exhibiting Circular Dichroism at Visible Wavelengths. Micromachines 2020, 11, 641.

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