A metacontinuum model for phase gradient metasurfaces [PDF]
Scientific Reports, 2023 Acoustic metamaterials and metasurfaces often present complex geometries and microstructures. The development of models of reduced complexity is fundamental to alleviate the computational cost of their analysis and derivation of optimal designs. The main
Giorgio Palma, Umberto Iemma
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Polarization-Independent High-Q Phase Gradient Metasurfaces. [PDF]
Nano LettDielectric metasurfaces have emerged as an unprecedented platform for precise wavefront manipulation at subwavelength scales with nearly zero loss. When aiming at dynamic applications such as AR/VR and LiDAR, high-quality factor (high-Q) phase gradient metasurfaces have emerged as a way to boost weak light-material interactions in flat-optical ...
Zhao B, Lin L, Lawrence M.
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Polarization-Insensitive Beam Splitter with Variable Split Angles and Ratios Based on Phase Gradient Metasurfaces [PDF]
Nanomaterials, 2021 The beam splitter is a common and critical element in optical systems. Traditional beam splitters composed of prisms or wave plates are difficult to be applied to miniaturized optical systems because they are bulky and heavy.
Quan He, Zhe Shen
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Wideband RCS Reduction by Single-Layer Phase Gradient Modulated Surface [PDF]
Sensors, 2022 This paper deals with the design and fabrication of an unpretentious (single-layer, without any lump element) broadband (97%, 11.3–32.3 GHz) radar cross-section reduction (RCSR) modulated surface (MS).
Yousef Azizi +3 more
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Graphene-Enabled Tunable Phase Gradient Metasurface for Broadband Dispersion Manipulation of Terahertz Wave [PDF]
Micromachines, 2023 With the increasing demand for the miniaturization and flexibility of optical devices, graphene-based metasurfaces have emerged as a promising ideal design platform for realizing planar and tunable electromagnetic or optical devices.
Yin Zhang, Yijun Feng, Junming Zhao
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All-Dielectric Phase-Gradient Metasurface Performing High-Efficiency Anomalous Transmission in the Near-Infrared Region. [PDF]
Nanoscale Res Lett, 2021 Wu T +6 more
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Phase-field gradient theory [PDF]
Zeitschrift für angewandte Mathematik und Physik, 2021 AbstractWe propose a phase-field theory for enriched continua. To generalize classical phase-field models, we derive the phase-field gradient theory based on balances of microforces, microtorques, and mass. We focus on materials where second gradients of the phase field describe long-range interactions.
Luis Espath, Victor Calo
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Determining the Phase Gradient Parameter of Three-Dimensional Polymorphic Beams
Frontiers in Physics, 2022 Three-dimensional polymorphic beams (3D PBs) with arbitrary 3D curves have drawn increasing attention. In this paper, we introduce the concept of phase gradient parameter (PGP) to describe the accumulation of phase along the curvilinear trajectory of a ...
Xue Yun +15 more
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Optical Spin Hall Effect in Closed Elliptical Plasmonic Nanoslit with Noncircular Symmetry
Nanomaterials, 2021 We investigated the optical spin Hall effect (OSHE) of the light field from a closed elliptical metallic curvilinear nanoslit instead of the usual truncated curvilinear nanoslit.
Xiaorong Ren +9 more
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Optical Forces Arising from Phase Gradients [PDF]
Physical Review Letters, 2008 We demonstrate both theoretically and experimentally that gradients in the phase of a light field exert forces on illuminated objects, including forces transverse to the direction of propagation. This effect generalizes the notion of the photon orbital angular momentum carried by helical beams of light.
Roichman, Yohai +4 more
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