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Ultrathin Bimetal Color Filter Based on Plasmonic Nanostructure

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Plasmonic subtractive color filters through a nanostructured ultrathin Ag film have attracted intensive attention due to their good durability, high color tunability and high transmission. However, Ag film suffers from discontinuity when the thickness is below 15 nm, which limits the further increasement of transmission efficiency. Herein a bimetal ultrathin (~10 nm) subtractive color filter with one dimensional nanogratings was demonstrated and fabricated. By adding an embedded Al layer to suppress the formation of Ag islands, a smooth, continuous and reliable bimetal film was obtained. At the same time, the blue shift of transmission minimum was beneficial to overcome difficulty in nanostructure fabrication. This method also provided a new approach to tune the color by simply varying the thickness of Al layer. A broad palette of colors, including cyan, magenta and yellow, was attained in bimetal color filter with high transmission beyond 80%.
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Keywords: Bimetal Filter; Color Filter; High Transmission; Nanostructure; Ultrathin Film

Document Type: Research Article

Affiliations: 1: College of Physical Science and Technology, Sichuan University, Chengdu 610065, China 2: Chongqing Key Laboratory of Multi-Scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China

Publication date: January 1, 2019

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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