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Transmissive structural color filters using vertically coupled aluminum nanohole/nanodisk array with a
Peng Dai1, Yasi Wang2, Xupeng Zhu1
1School of Physics and Electronics, State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, People's Republic of China.
Nanotechnology
|July 5, 2018
Summary
Researchers created vibrant structural colors using aluminum nanohole arrays with nanodisks. This simple fabrication method enables high-resolution full-color printing with tunable colors and enhanced light transmission.
Area of Science:
- Plasmonics
- Nanophotonics
- Materials Science
Background:
- Structural colors offer a pigment-free method for color generation.
- Plasmonic nanostructures enable unique light-matter interactions for optical applications.
Purpose of the Study:
- To demonstrate a novel configuration for generating transmissive structural colors.
- To investigate the optical properties and fabrication of nanohole/nanodisk arrays.
Main Methods:
- Fabrication of triangular-lattice square nanohole arrays in aluminum film with embedded aluminum nanodisks.
- Experimental and theoretical investigation of optical behaviors, including transmission spectra.
- Tuning of array period and nanoholes size to control color properties.
Main Results:
- Achieved transmissive structural colors across the visible spectrum with tunable brightness and saturation.
- Identified localized surface plasmon resonance in nanohole arrays as key to extraordinary transmission.
- Observed significant enhancement in transmission due to coupling between nanodisks and nanoholes.
Conclusions:
- Vertically coupled aluminum nanohole/nanodisk arrays provide a wide color gamut for high-resolution printing.
- The demonstrated configuration offers advantages in fabrication simplicity and material cost compared to existing plasmonic color filters.
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