Journal
NANO LETTERS
Volume 21, Issue 11, Pages 4554-4562Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.1c00104
Keywords
metasurfaces; liquid crystals; electrically tunable; dynamic device
Categories
Funding
- National Natural Science Foundation of China [52005175]
- Natural Science Foundation of Hunan Province of China [2020JJ5059]
- Shenzhen Science and Technology Program [RCBS20200714114855118]
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This research demonstrates an electrically tunable multifunctional polarization-dependent metasurface integrated with liquid crystals in the visible range, allowing for continuous intensity tuning and switching of two helicity channels. Additionally, electrically tunable mono- and multicolor switchable metaholograms and dynamic varifocal metalenses are showcased.
Metasurfaces open up new avenues for designing planar optics, enabling compact dynamic metadevices. Numerous dynamic strategies have been proposed, among which liquid crystal (LC) based metasurfaces are expected due to the maturity of LC materials. However, existing schemes rarely exploit the polarization manipulation capabilities of metasurfaces and the limited performance hinders the development of practical addressable devices. Here, we demonstrate an electrically tunable multifunctional polarization-dependent metasurface integrated with LCs in the visible range. By a combination of the helicity-dependent metasurface and the birefringent LCs, continuous intensity tuning and switching of two helicity channels are realized. Electrically tunable mono- and multicolor switchable metaholograms and dynamic varifocal metalenses are demonstrated with a simple and performance-enhancing integration scheme. Further, electrically addressable dynamic metasurfaces are achieved. The proposed modulation and integration schemes pave the way for addressable dynamic metasurface devices in various applications, such as space light modulators, light detection and ranging systems, and holographic displays.
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