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All-dielectric structural coloration empowered by bound states in the continuum
Publikationstyp
Journal Article
Date Issued
2024-10-07
Sprache
English
Author(s)
Journal
Volume
13
Issue
23
Start Page
4327
End Page
4335
Citation
Nanophotonics 13 (23): 4327-4335 (2024)
Publisher DOI
Scopus ID
Publisher
SPIE
The technological requirements of low-power and high-fidelity color displays have been instrumental in driving research into advanced coloration technologies. At the forefront of these developments is the implementation of dye-free approaches, which overcome previous constraints related to color resolution and fading. Resonant dielectric nanostructures have emerged as a promising paradigm, showing great potential for high efficiency, high color saturation, wide gamut palette, and image reproduction. However, they still face limitations related to color accuracy, purity, and simultaneous brightness tunability. Here, we demonstrate an all-dielectric metasurface empowered by photonic bound states in the continuum (BICs), which supports sharp resonances throughout the visible spectral range, ideally suited for producing a wide range of structural colors. The metasurface design consists of TiO<inf>2</inf> ellipses with carefully controlled sizes and geometrical asymmetry, allowing versatile and on-demand variation of the brightness and hue of the output colors, respectively.
Subjects
all-dielectric
bound states in the continuum
color printing
DDC Class
600: Technology