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Copper-based etalon filter using antioxidant graphene layer

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Title
Copper-based etalon filter using antioxidant graphene layer
Author
Nam, KiinLee, YoujinKim, SeongYeonKim, SunghwanHong, Sung JuChoi, WonjongLee, JinheeKim, HyelinKim, Dai-SikKim, JunHoChoi, SoobongBahk, Young-Mi
Issue Date
2020-10
Publisher
IOP PUBLISHING LTD
Citation
NANOTECHNOLOGY, v.31, no.44, pp.445206
Abstract
Copper is a low-cost material compared to silver and gold, having high reflectivity in the near infrared spectral range as well as good electrical and thermal conductivity. Its properties make it a good candidate for metal-based low-cost multilayer thin-film devices and optical components. However, its high reflectance in the devices is reduced because copper is easily oxidized. Here, we suggest a copper-based Fabry-Perot optical filter consisting of a thin dielectric layer stacked between two copper films, which can realize low-cost production compared to a conventional silver-based etalon filter. The reduced performance due to the inherent oxidation of the copper surface can be overcome by passivating the copper films with monolayer graphene. The anti-oxidation of copper film is investigated by optical microscopy, x-ray photoelectron spectroscopy, and transmission measurement in UV-vi spectral ranges. Our results show that the graphene coating can be expanded for various metal-based optical devices in terms of anti-corrosion.
URI
https://scholarworks.unist.ac.kr/handle/201301/49115
URL
https://iopscience.iop.org/article/10.1088/1361-6528/aba3dc
DOI
10.1088/1361-6528/aba3dc
ISSN
0957-4484
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PHY_Journal Papers
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