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Open AccessArticle

Dynamically Tunable Light Absorbers as Color Filters Based on Electrowetting Technology

Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, China
Author to whom correspondence should be addressed.
Nanomaterials 2019, 9(1), 70;
Received: 21 November 2018 / Revised: 26 December 2018 / Accepted: 31 December 2018 / Published: 6 January 2019
(This article belongs to the Special Issue Optoelectronic Nanodevices)
PDF [1623 KB, uploaded 6 January 2019]
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A device that uses the electrowetting fluid manipulation technology to realize the reversible and dynamical modulation of the local surface plasmon resonance is invented. By varying the electrowetting voltage, the distribution of fluids media surrounding the grating structure get changed accordingly, causing the modulation of the plasmonic resonance peak. The simulation results indicated that three primary colors, that are cyan, magenta and yellow (CMY) can be respectively reflected through selecting suitable structural parameters. More importantly, for the first time, the invented fluid-based devices have exhibited fine-tuning characteristics for each primary color. Finally, the device has been proved to have a large color gamut range in the Commission International De L’E’clairage (CIE) 1931 color space. View Full-Text
Keywords: electrowetting; tunable absorbers; subwavelength metal grating; plasmon resonance electrowetting; tunable absorbers; subwavelength metal grating; plasmon resonance

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Wu, J.; Du, Y.; Xia, J.; Zhang, T.; Lei, W.; Wang, B. Dynamically Tunable Light Absorbers as Color Filters Based on Electrowetting Technology. Nanomaterials 2019, 9, 70.

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