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Polarization-controlled bifunctional metasurface for structural color printing and beam deflection
Optics Letters
|April 3, 2020
Summary
We developed a polarization-controlled bifunctional metasurface using trapezoidal nanoantennas. This device achieves both structural color printing and beam deflection on a single chip for advanced optical applications.
Area of Science:
- Metasurface optics
- Plasmonics
- Nanophotonics
Background:
- Metasurfaces offer miniaturization and novel optical functionalities.
- Controlling light polarization is crucial for advanced optical devices.
Purpose of the Study:
- To propose a polarization-controlled bifunctional metasurface.
- To integrate structural color printing and beam deflection functionalities.
Main Methods:
- Designing and fabricating a metasurface with arrayed trapezoidal nanoantennas.
- Utilizing orthogonal-polarized incidence to generate gap-surface plasmons.
- Characterizing optical performance for color printing and beam deflection.
Main Results:
- Achieved structural color printing across 400-800 nm with subwavelength resolution and broad gamut.
- Demonstrated beam deflection from 360-540 nm, mapping light to the first diffraction order with anomalous angles from 40.4° to 76.6°.
- Confirmed polarization-controlled operation regulating intensity and phase.
Conclusions:
- The proposed metasurface successfully integrates two distinct optical functions.
- This bifunctional metasurface is a key component for integrated optics.
- Potential applications span optical and biological fields.
