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Dynamic Bifunctional Metasurfaces for Holography and Color Display
Wenhong Yang1, Geyang Qu1, Fangxing Lai1
1State Key Laboratory on Tunable laser Technology, Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen, 518055, China.
Advanced Materials (Deerfield Beach, Fla.)
|July 26, 2021
Summary
Researchers developed dynamic bifunctional metasurfaces that combine structural color and metaholograms. These novel metasurfaces allow for selectively switching holographic images on and off, advancing practical applications.
Area of Science:
- Optics and Photonics
- Materials Science
- Nanotechnology
Background:
- Metasurfaces excel at wavefront shaping, enabling applications like color nanoprinting and metaholograms.
- Combining these functions into dual-mode metasurfaces expands capabilities but current versions are static, limiting practical use.
Purpose of the Study:
- To realize dynamic bifunctional metasurfaces capable of switching between holographic and structural color functionalities.
- To enable selective switching of metaholograms by controlling spectral and phase responses.
Main Methods:
- Multiplexing five metaholograms at two wavelengths with structural colors by tuning metasurface spectral and phase responses.
- Utilizing destructive interference and environmental resonance to control light diffraction states (ON/OFF).
Main Results:
- Demonstrated dynamic control over holographic images by selectively switching metaholograms on and off.
- Showcased the ability to maintain or switch diffraction states based on changes in the surrounding refractive index.
Conclusions:
- The developed dynamic bifunctional metasurfaces represent a significant advancement over static counterparts.
- This work paves the way for practical, all-dielectric metasurface applications requiring dynamic control.
