KAUST DepartmentPhysical Sciences and Engineering (PSE) Division
Materials Science and Engineering Program
Biological and Environmental Sciences and Engineering (BESE) Division
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AbstractDisplay technologies are evolving more toward higher resolution and miniaturization. Plasmonic color pixels can offer solutions to realize such technologies due to their sharp resonances and selective scattering and absorption at particular wavelengths. Metal nanosphere dimers are capable of supporting plasmon resonances that can be tuned to span the entire visible spectrum. In this article, we demonstrate numerically bright color pixels that are highly polarized and broadly tuned using periodic arrays of metal nanosphere dimers on a glass substrate. We show that it is possible to obtain RGB pixels in the reflection mode. The longitudinal plasmon resonance of nanosphere dimers along the axis of the dimer is the main contributor to the color of the pixel, while far-field diffractive coupling further enhances and tunes the plasmon resonance. The computational method used is the finite-difference time-domain method. The advantages of this approach include simplicity of the design, bright coloration, and highly polarized function. In addition, we show that it is possible to obtain different colors by varying the angle of incidence, the periodicity, the size of the dimer, the gap, and the substrate thickness.
CitationAlrasheed S, Di Fabrizio E (2018) Plasmonic nanospherical dimers for color pixels. Nanomaterials and Nanotechnology 8: 184798041877240. Available: http://dx.doi.org/10.1177/1847980418772402.
SponsorsFunding: The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This study was financially supported by the King Abdullah University of Science and Technology start-up funding. Acknowledgment: The authors thank Structural Molecular Imaging Light Enhanced spectroscopies (SMILEs) lab members for the fruitful discussions and suggestions.
JournalNanomaterials and Nanotechnology
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