All-metallic wide-angle metasurfaces for multifunctional polarization manipulation

Ma, Xiaoliang; Pu, Mingbo; Li, Xiong; Guo, Yinghui; Luo, Xiangang

doi:10.29026/oea.2019.180023

Cited by 77 publications

(38 citation statements)

References 37 publications

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“…In the past few years, metasurfaces emerged as an unprecedented platform enabling wavefront manipulation of light at wavelength or sub‐wavelength scales . Construction of a desired phase profile at will can be realized through spatially varying sub‐wavelength‐scale nanoantennas, underpinning diverse ultrathin optical devices, including anomalous beam deflectors, metalenses, metahologram, polarizers, and vortex beam generators . In particular, phase‐gradient metasurfaces can cumulatively produce blazed phase profiles for essential far‐field interference to redirect the incident wave to the anticipated direction under normal incidences .…”

Section: Introductionmentioning

confidence: 99%

All‐Dielectric Kissing‐Dimer Metagratings for Asymmetric High Diffraction

Shi

Wang

Deng

et al. 2019

Advanced Optical Materials

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and vortex beam generators. [10][11][12] In particular, phase-gradient metasurfaces can cumulatively produce blazed phase profiles for essential far-field interference to redirect the incident wave to the anticipated direction under normal incidences. [13][14][15] However, these approaches suffer from the intrinsic restriction owing to the limited number of elements in a supercell which can fit into each periodically repeated units to discretely map the desired phase profiles. Apparently, phase-gradient metasurfaces inevitably deteriorate beam steering performance at large bending angles with significantly degraded efficiencies. [13][14][15] To tackle this challenge, high diffraction metagratings capable of ultrahigh angle beam bending were proposed. [16][17][18][19][20][21][22][23][24][25][26][27][28] Breaking the symmetry of the illumination condition of the metagrating can allow high diffractions, funneling light into the desired diffraction order with high efficiencies at oblique incidences. [16][17][18][19][20][21][22][23] Based on this scheme, high diffractions in either reflection mode using metallic metagratings [16][17][18][19] or in the transmission mode using all-dielectric metagtratings [20][21][22][23] have been achieved. Alternatively, at symmetric illumination condition, asymmetric building blocks with multiple separate inclusions of different dimensions or geometries were usually considered as a necessity to generate far-field interference for directional scattering patterns without adversely affecting each other's mode. Engineering the directional scattering patterns of periodically repeated building blocks of the metagrating demonstrates the potential to channel the incident light into desired diffraction orders at will. [24][25][26][27][28] In particular, high-index all-dielectric nanoantennas featured with geometry-tunable multiple Mie resonances for associated novel effects [26] open a new route to selectively enhance/suppress a single diffraction order in both reflection and transmission modes. However, the innate frequency divergence of multiple separate inclusions hinders the high diffraction efficiency from wide frequency and angle range, which are highly desirable for various beam steering applications. Moreover, the diffraction efficiency is strongly dependent on the separation between such asymmetric nanoantennas, which exacerbates challenges for stringent fabrication precision.Here, we propose a kind of kissing-dimer metagratings (Figure 1a), which can steer the illumination light Transcending the common perceptions of phase-gradient metasurfaces, metagratings emerge as a new paradigm for wavefront manipulation directly on the desired diffraction order with ultrahigh deflection angles. However, previous metagratings rely on directional scattering caused by multiresonant interference between multiple separate inclusions, of which the high diffraction efficiencies are only optimized with limited bandwidth and incident angle tolerance. Here, a kind of asymmetric kissing-dimer metagrating...

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Section: Introductionmentioning

confidence: 99%

All‐Dielectric Kissing‐Dimer Metagratings for Asymmetric High Diffraction

Shi

Wang

Deng

et al. 2019

Advanced Optical Materials

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“…Metasurfaces, consisting of subwavelength‐spaced metallic or dielectric nanostructures (meta‐atoms), have electromagnetic responses that mainly derive from the engineered structures rather than the constituent materials, leading to many extraordinary properties 27–29. Due to the strong light‐matter interaction, it can locally control light properties such as phase,30–33 polarization,34,35 and amplitude,36–38 which provides an elegant solution to miniaturize the optical systems to harness AM of light. Recently, a metasurface consisting of nanoslit antennas, has been proposed to realize AM multiplexing/demultiplexing 39.…”

Section: Optical Response and Polarization Conversion Efficiency For mentioning

confidence: 99%

Efficient Optical Angular Momentum Manipulation for Compact Multiplexing and Demultiplexing Using a Dielectric Metasurface

Zhang

et al. 2020

Advanced Optical Materials

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Angular momentum (AM), one of the most basic physical properties of light, has attracted great interest of the scientific community due to its significant values in high-capacity optical communication. To realize AM multiplexing and demultiplexing, the methods based on metallic metasurface are proposed, which suffers from huge Ohmic losses. Besides, additional coupling elements are necessary for coupling the output light into singlemode waveguides. Here, an efficient and focused AM multiplexing and demultiplexing system based on dielectric metasurfaces are proposed and investigated. Employing the off-axis technique and spin photonic Hall effect, the orbital angular momentum (OAM) and spin angular momentum (SAM) multiplexing/demultiplexing can be achieved. A 10-channel AM multiplexing/ demultiplexing system based on the proposed method is demonstrated. The demultiplexing efficiencies for all AM stats are above 8% and the maximum crosstalk among all AM states is −12.8 dB, which exhibits an excellent performance of the proposed metasurface for the AM demultiplexing. Furthermore, the output light is focused at the focal plane, which can be directly coupled into the single-mode waveguides and improve the compactness of the system. The proposed method provides an effective way for AM multiplexing and demultiplexing, which possess a crucial potential for high-capacity optical communication applications.

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“…As their 2D counterparts, metasurfaces consisting of subwavelength structures enable flexible manipulation of light's fundamental properties like amplitude, phase, and polarization, by properly utilizing strong interactions between subwavelength structures and electromagnetic waves 2–4. Many exotic phenomena and extraordinary planar optical devices have been realized, including photonic spin–orbit interactions (SOIs),5–7 spatiotemporal light control,8 ultrafast optical pulse shaping,9 achromatic wavefront shaping,10,11 invisibility cloaking,12 full‐color 3D holography,13–15 structural color printing,16–18 and many others 19–22. Among the plethora of applications currently attracting great interests, both metaholograms and metaprints are promising as the next‐generation optical security/storage devices 23,24.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Full‐Color Printing and Holography Enabled by Centimeter‐Scale Plasmonic Metasurfaces

Zhang

Gao

et al. 2020

Advanced Science

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Optical metasurfaces enable novel ways to locally manipulate light's amplitude, phase, and polarization, underpinning a newly viable technology for applications, such as high‐density optical storage, holography, and displays. Here, a high‐security‐level platform enabled by centimeter‐scale plasmonic metasurfaces with full‐color, high‐purity, and enhanced‐information‐capacity properties is proposed. Multiple types of independent information can be embedded into a single metamark using full parameters of light, including amplitude, phase, and polarization. Under incoherent white light, the metamark appears as a polarization‐ and angle‐encoded full‐color image with flexibly controlled hue, saturation, and brightness, while switching to multiwavelength holograms under coherent laser illumination. More importantly, for actual applications, the extremely shallow functional layer makes such centimeter‐scale plasmonic metamarks suitable for cost‐effective mass production processes. Considering these superior performances of the presented multifunctional plasmonic metasurfaces, this work may find wide applications in anticounterfeiting, information security, high‐density optical storage, and so forth.

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All-metallic wide-angle metasurfaces for multifunctional polarization manipulation

Cited by 77 publications

References 37 publications

All‐Dielectric Kissing‐Dimer Metagratings for Asymmetric High Diffraction

All‐Dielectric Kissing‐Dimer Metagratings for Asymmetric High Diffraction

Efficient Optical Angular Momentum Manipulation for Compact Multiplexing and Demultiplexing Using a Dielectric Metasurface

Simultaneous Full‐Color Printing and Holography Enabled by Centimeter‐Scale Plasmonic Metasurfaces

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