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    Non-iridescent Transmissive Structural Color Filter Featuring Highly Efficient Transmission and High Excitation Purity

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    Author
    Shrestha, VR; Lee, S-S; Kim, E-S; Choi, D-Y
    Date
    2014-05-12
    Source Title
    Scientific Reports
    Publisher
    NATURE PUBLISHING GROUP
    University of Melbourne Author/s
    Shrestha, Vivek
    Affiliation
    School of Physics
    Metadata
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    Document Type
    Journal Article
    Citations
    Shrestha, V. R., Lee, S. -S., Kim, E. -S. & Choi, D. -Y. (2014). Non-iridescent Transmissive Structural Color Filter Featuring Highly Efficient Transmission and High Excitation Purity. SCIENTIFIC REPORTS, 4 (1), https://doi.org/10.1038/srep04921.
    Access Status
    Open Access
    URI
    http://hdl.handle.net/11343/257802
    DOI
    10.1038/srep04921
    Abstract
    Nanostructure based color filtering has been considered an attractive replacement for current colorant pigmentation in the display technologies, in view of its increased efficiencies, ease of fabrication and eco-friendliness. For such structural filtering, iridescence relevant to its angular dependency, which poses a detrimental barrier to the practical development of high performance display and sensing devices, should be mitigated. We report on a non-iridescent transmissive structural color filter, fabricated in a large area of 76.2 × 25.4 mm(2), taking advantage of a stack of three etalon resonators in dielectric films based on a high-index cavity in amorphous silicon. The proposed filter features a high transmission above 80%, a high excitation purity of 0.93 and non-iridescence over a range of 160°, exhibiting no significant change in the center wavelength, dominant wavelength and excitation purity, which implies no change in hue and saturation of the output color. The proposed structure may find its potential applications to large-scale display and imaging sensor systems.

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