Multifunctional metaoptics based on bilayer metasurfaces

Zhou, You; Kravchenko, Ivan I.; Wang, Hao; Zheng, Hanyu; Gu, Gong; Valentine, Jason

doi:10.1038/s41377-019-0193-3

Cited by 171 publications

(133 citation statements)

References 39 publications

Supporting

Mentioning

133

Contrasting

Order By: Relevance

“…They are subwavelength nanostructured interfaces, capable of controlling optical waves. A large variety of components has been reported, including lenses [9][10][11][12][13][14][15][16] , holograms, quarter-wave plates, half-wave plates, vortex plates, carpet cloaks, concentrators, polarizers, thin absorbers, or sensors [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] . Despite exciting findings, achieving simultaneously high efficiencies and large bandwidths has remained a challenge.…”

mentioning

confidence: 99%

Octave bandwidth photonic fishnet-achromatic-metalens

et al. 2020

View full text Add to dashboard Cite

Planar structured interfaces, also known as metasurfaces, are continuously attracting interest owing to their ability to manipulate fundamental attributes of light, including angular momentum, phase, or polarization. However, chromatic aberration, limiting broadband operation, has remained a challenge for metasurfaces-based optical components and imagers. The limitation stems from the intrinsic dispersion of existing materials and design principles. Here we report and experimentally demonstrate polarization-independent fishnetachromatic-metalenses with measured average efficiencies over 70% in the continuous band from the visible (640 nm) to the infrared (1200 nm). Results of the scalable platform are enabling for applications requiring broad bandwidth and high efficiency including energy harvesting, virtual reality and information processing devices, or medical imaging.

show abstract

mentioning

confidence: 99%

Octave bandwidth photonic fishnet-achromatic-metalens

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The encoded hologram is designed to appear in a particular linear cross-polarization channel, while it disappears in the reverse propagation direction. Apart from plasmonic counterparts, Zhou et al [113] explored cascaded dielectric metasurfaces which expand the design space for meta-optics. The coupling between the two layers can be designed to minimize, and the ability to independently control the geometry and function of each layer enables the development of multifunctional metaoptics in which two or more optical Fig.…”

Section: Janus and Bilayer Metasurfaces Holographymentioning

confidence: 99%

Recent advances in multi-dimensional metasurfaces holographic technologies

2020

View full text Add to dashboard Cite

Holography has attracted tremendous interest due to its capability of storing both the amplitude and phase of light field and reproducing vivid three-dimensional scenes. However, the large pixel size, low resolution, small field-of-view (FOV) and limited space-bandwidth of traditional spatial light modulator (SLM) devices restrict the possibility of improving the quality of reconstructed images. With the development of nanofabrication technologies, metasurfaces have shown great potential in manipulating the amplitude, phase, polarization, frequency or simultaneously multiple parameters of output light in ultrashort distance with subwavelength resolution by tailoring the scattering behaviour of consisted nanostructures. Such flexibilities make metasurface a promising candidate for holographic related applications. Here, we review recent progresses in the field of metasurface holography. From the perspective of the fundamental properties of light, we classify the metasurface holography into several categories such as phase-only holography, amplitude-only holography, complex amplitude holography and so on. Then, we introduce the corresponding working principles and design strategies. Meanwhile, some emerging types of metasurface holography such as tunable holography, nonlinear holography, Janus (or directional related) and bilayer metasurfaces holography are also discussed. At last, we make our outlook on metasurface holography and discuss the challenges we may face in the future.

show abstract

“…In the perspective of dynamic color generation, this novel and simple strategy can dynamically enhance and tune purities of reflection color ( Figure 7D) without significant fabrication problems compared to the original PCMA devices. Such PCMA heterostructures also hold a potential of vertical integration with other functional metasurfaces [62][63][64].…”

Section: Versatile Optical Applications and Design Extensibilitymentioning

confidence: 99%

Dynamic phase-change metafilm absorber for strong designer modulation of visible light

et al. 2020

View full text Add to dashboard Cite

AbstractEffective dynamic modulation of visible light properties has been significantly desired for advanced imaging and sensing technologies. In particular, phase-change materials have attracted much attention as active material platforms owing to their broadband tunability of optical dielectric functions induced by the temperature-dependent phase-changes. However, their uses for visible light modulators are still limited to meet multi-objective high performance owing to the low material quality factor and active tunability in the visible regime. Here, a design strategy of phase-change metafilm absorber is demonstrated by making the use of the material drawbacks and extending design degree of freedom. By engineering tunability of effective anisotropic permittivity tensor of VO2-Ag metafilm around near-unity absorption conditions, strong dynamic modulation of reflection wave is achieved with near-unity modulation depth at desired wavelength regions without sacrificing bandwidth and efficiency. By leveraging effective medium theory of metamaterial and coupled mode theory, the intuitive design rules and theoretical backgrounds are suggested. It is also noteworthy that the dynamic optical applications of intensity modulation, coloring, and polarization rotation are enabled in a single device. By virtue of ultrathin flat configuration of a metafilm absorber, design extensibility of reflection spectrum is also verified. It is envisioned that our simple and powerful strategy would play a robust role in development of miniaturized light modulating pixels and a variety of photonic and optoelectronic applications.

show abstract

Multifunctional metaoptics based on bilayer metasurfaces

Cited by 171 publications

References 39 publications

Octave bandwidth photonic fishnet-achromatic-metalens

Octave bandwidth photonic fishnet-achromatic-metalens

Recent advances in multi-dimensional metasurfaces holographic technologies

Dynamic phase-change metafilm absorber for strong designer modulation of visible light

Contact Info

Product

Resources

About