Revealing topological phase in Pancharatnam–Berry metasurfaces using mesoscopic electrodynamics

Gao, Zhanjie; Golla, Sandeep; Sawant, Rajath; Osipov, Vladimir Al.; Brière, Gauthier; Vézian, S.; Damilano, B.; Genevet, Patrice; Dorfman, Konstantin E.

doi:10.1515/nanoph-2020-0365

Cited by 12 publications

(6 citation statements)

References 52 publications

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“…[85][86][87][88][89] Further, two arrays of anisotropic resonators with relative angles, continuous phase control from 0 to 2𝜋 can achieve circularly polarized light in Pancharatnam-Berry metasurfaces. [90] Circularly polarized light can also be generated from metasurfaces of resonators with spatially varied [81] Copyright 2011, AAAS. Adapted with permission.…”

Section: Phase-gradient Metasurfacesmentioning

confidence: 99%

“…[ 85–89 ] Further, two arrays of anisotropic resonators with relative angles, continuous phase control from 0 to 2 π can achieve circularly polarized light in Pancharatnam–Berry metasurfaces. [ 90 ] Circularly polarized light can also be generated from metasurfaces of resonators with spatially varied orientations, where the amplitude of the scattered waves can be controlled by resonator shapes and phase‐by‐orientation angles (Figure 3a,b). [ 91–96 ] Plasmonic metasurfaces also attract extensive research interest in color generation with resolutions beyond the diffraction limits (Figure 3a,b).…”

Section: Basics Of Plasmonic Resonancesmentioning

confidence: 99%

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Hybrid Metasurfaces of Plasmonic Lattices and 2D Materials

Guo

Deng

2023

Adv Funct Materials

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Plasmonic metasurfaces can significantly enhance the interaction between light and 2D materials. Hybrid structures of plasmonic lattices and 2D materials show great promise for both fundamental and practical studies because of their unprecedented ability for precise manipulation of light at the nanoscale. This review starts with an overview of the basic concepts of plasmonic lattices and optical properties of 2D materials, as well as fabrication strategies for hybrid metasurfaces. Then, the enhanced photoluminescence, quantum emission, optoelectronic detection, nonlinear process, and valleytronics in hybrid metasurfaces are summarized, and their development for nanophotonic functional devices are reviewed. Further, several compelling topics are also outlined that provide outlooks for future directions of hybrid metasurfaces such as novel structural design and high‐quality fabrication, all‐dielectric metasurfaces, dynamic metasurfaces, and plasmonic mediation of chemical reactions and physical processes. It is believed that hybrid metasurfaces of plasmonic lattices and 2D materials can open prospects for versatile platforms for light‐matter interactions and contribute to the revolutions on nanophotonic devices.

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Section: Phase-gradient Metasurfacesmentioning

confidence: 99%

Section: Basics Of Plasmonic Resonancesmentioning

confidence: 99%

Hybrid Metasurfaces of Plasmonic Lattices and 2D Materials

Guo

Deng

2023

Adv Funct Materials

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“…Such metasurfaces allow manipulating light on a subwavelength regime, changing properties such as phase, amplitude and polarization. They have been recently exploited to realize interesting effects in the field of flat optics 15 , 16 , topological photonics 17 and generation of geometrical phases 18 , 19 . Recently, the focus has shifted to vertical stacking of patterned layers 20 where the interlayer distance and the layers number may act as a new degree of freedom to modify the optical band structure.…”

Section: Introductionmentioning

confidence: 99%

Terahertz waves dynamic diffusion in 3D printed structures

Missori

Pilozzi

Conti

2022

Sci Rep

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Applications of metamaterials in the realization of efficient devices in the terahertz band have recently been considered to achieve wave deflection, focusing, amplitude manipulation and dynamical modulation. Terahertz metamaterials offer practical advantages since their structures have typical sizes of hundreds microns and are within the reach of current three-dimensional (3D) printing technologies. Here, we propose terahertz photonic structures composed of dielectric rods layers made of acrylonitrile styrene acrylate realized by low-cost, rapid, and versatile fused deposition modeling 3D-printing. Terahertz time-domain spectroscopy is employed for the experimental study of their spectral and dynamic response. Measured spectra are interpreted by using simulations performed by an analytical exact solution of the Maxwell equations for a general incidence geometry, by a field expansion as a sum over reciprocal lattice vectors. Results show that the structures possess specific spectral forbidden bands of the incident THz radiation depending on their optical and geometrical parameters. We also find evidence of disorder in the 3D printed structure resulting in the closure of the forbidden bands at frequencies above 0.3 THz. The size disorder of the structures is quantified by studying the dynamics diffusion of THz pulses as a function of the numbers of layers of dielectric rods. Comparison with simulations of light diffusion in photonic crystals with increasing disorder allows estimating the size distributions of elements. By using a Mean Squared Displacement model, from the broadening of the pulses’ widths it is also possible to estimate the diffusion coefficient of the terahertz radiation in the photonic structures.

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“…They are flat optical components made of arrangements of scattering objects (meta-atoms) of subwavelength size and periodicity. Currently, four light modulation mechanisms are used to create metasurfaces: light scattering from resonant nanoparticles 36,37 ,geometric phase occurring during polarization conversion (Pancharatnam-Berry phase) 38 , accumulated propagation phase in pillars with controllable effective Refractive Index (ERI) 39 and the topological phase in vicinity of singularities 40 . Usually, MSs comprise inherently passive components, designed to perform a fixed optical functionality after fabrication.…”

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confidence: 99%

Metasurface-enhanced light detection and ranging technology

et al. 2022

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Deploying advanced imaging solutions to robotic and autonomous systems by mimicking human vision requires simultaneous acquisition of multiple fields of views, named the peripheral and fovea regions. Among 3D computer vision techniques, LiDAR is currently considered at the industrial level for robotic vision. Notwithstanding the efforts on LiDAR integration and optimization, commercially available devices have slow frame rate and low resolution, notably limited by the performance of mechanical or solid-state deflection systems. Metasurfaces are versatile optical components that can distribute the optical power in desired regions of space. Here, we report on an advanced LiDAR technology that leverages from ultrafast low FoV deflectors cascaded with large area metasurfaces to achieve large FoV (150°) and high framerate (kHz) which can provide simultaneous peripheral and central imaging zones. The use of our disruptive LiDAR technology with advanced learning algorithms offers perspectives to improve perception and decision-making process of ADAS and robotic systems.

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Revealing topological phase in Pancharatnam–Berry metasurfaces using mesoscopic electrodynamics

Cited by 12 publications

References 52 publications

Hybrid Metasurfaces of Plasmonic Lattices and 2D Materials

Hybrid Metasurfaces of Plasmonic Lattices and 2D Materials

Terahertz waves dynamic diffusion in 3D printed structures

Metasurface-enhanced light detection and ranging technology

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