Mechanisms of 2π phase control in dielectric metasurface and transmission enhancement effect

Li, Jing; Wu, Tong; Xu, Wenbin; Liu, Yumin; Liu, Chang; Wang, Yu; Yu, Zhongyuan; Yu, Li; Ye, Han

doi:10.1364/oe.27.023186

Cited by 34 publications

(26 citation statements)

References 35 publications

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“…Therefore, lx and wx are considered as the main optimization parameters to design a two-element phase-gradient Huygens' metasurface. Compared with some earlier reports [11][12][13]18,[26][27][28], the two-element metasurface has fewer optimization parameters, which simplifies the design According to the above analysis, it can be inferred that l x and w x are the two parameters that greatly influence the overlap of the ED and MD resonances. Therefore, l x and w x are considered as the main optimization parameters to design a two-element phase-gradient Huygens' metasurface.…”

Section: Metasurface Designmentioning

confidence: 94%

“…Therefore, l x and w x are considered as the main optimization parameters to design a two-element phase-gradient Huygens' metasurface. Compared with some earlier reports [11][12][13]18,[26][27][28], the twoelement metasurface has fewer optimization parameters, which simplifies the design process of the metasurface. To effectively inhibit the interaction between elements and obtain a large anomalous refraction angle, two elements are strategically placed in four short periods to form a unit cell, as shown in Figure 1c.…”

Section: Metasurface Designmentioning

confidence: 96%

“…Each element of the metasurface can be regarded as a Fabry-Perot cavity with low-quality factor, and the light bounces back and forth between the ends of these structures. Therefore, this type of metasurface is also known as a Fabry-Perot type metasurface [10][11][12][13][14]. However, Fabry-Perot cavities tend to be very long to achieve the conditions for resonance and phase changes.…”

Section: Introductionmentioning

confidence: 99%

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All-Dielectric Huygens’ Metasurface for Wavefront Manipulation in the Visible Region

Liu

Cao

et al. 2021

Materials

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All-dielectric Huygens’ metasurfaces have been widely used in wavefront manipulation through multipole interactions. Huygens’ metasurfaces utilize the superposition between an electric dipole and a magnetic dipole resonance to realize transmission enhancement and an accumulated 2π phase change. Benefiting from this unique property, we design and numerically investigate an all-dielectric Huygens’ metasurface exhibiting high-efficiency anomalous refraction. To suppress the substrate effect, the metasurface structure is submerged in a dielectric plate. We strategically placed two elements in four short periods to form a unit cell and adjusted the spacing between the two elements to effectively inhibit the interaction between elements. At the operating wavelength of 692 nm, the obtained anomalous transmission efficiency is over 90.7% with a diffraction angle of 30.84°. The performance of the proposed structure is far superior to most of the existing phase-gradient metasurface structures in the visible region, which paves the way for designing efficient beam deflection devices.

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Section: Metasurface Designmentioning

confidence: 94%

“…Therefore, l x and w x are considered as the main optimization parameters to design a two-element phase-gradient Huygens' metasurface. Compared with some earlier reports [11][12][13]18,[26][27][28], the twoelement metasurface has fewer optimization parameters, which simplifies the design process of the metasurface. To effectively inhibit the interaction between elements and obtain a large anomalous refraction angle, two elements are strategically placed in four short periods to form a unit cell, as shown in Figure 1c.…”

Section: Metasurface Designmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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All-Dielectric Huygens’ Metasurface for Wavefront Manipulation in the Visible Region

Liu

Cao

et al. 2021

Materials

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“…There is no abrupt phase change at a wavelength of 1529 nm, which proves that the phase shift is formed by only one mode. Therefore, the phase control mechanism at a wavelength of 1529 nm is analyzed by eigenmode analysis [ 42 ]. These nanorods can be considered low-quality-factor Fabry–Pérot resonators, and the phase can be modulated by the effective refractive index of the fundamental mode.…”

Section: Design and Methodsmentioning

confidence: 99%

All-Dielectric Phase-Gradient Metasurface Performing High-Efficiency Anomalous Transmission in the Near-Infrared Region

Liu

Wang

et al. 2021

Nanoscale Res Lett

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We propose and numerically demonstrate a phase-gradient metasurface with high anomalous transmission efficiency and a large anomalous refraction angle that consists of discontinuous regular hexagonal nanorods supported by a silica substrate. The metasurface achieves high anomalous transmission efficiency and a full 2$$\pi$$ π phase shift for the wavelength range of 1400–1600 nm. At a central wavelength of approximately 1529 nm, the total transmission efficiency reaches 96.5%, and the desired anomalous transmission efficiency reaches 96.2%, with an anomalous refraction angle as large as 30.64. With the adjustment of the period and the number of nanorods per periodic interval, the anomalous transmission efficiency exceeds 69.6% for a large anomalous refraction angle of 68.58. The superior performance of the proposed design may pave the way for its application in optical wavefront control devices.

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“…The sudden phase shift at the scatterers causes MSs to change the wave properties locally. Scatterers can cover an entire 2π phase shift by adjusting the geometry or alignment, allowing for arbitrary beam formation [ 56 ]. In the meantime, scatterers can be built to adjust the wave front.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Generation and Detection of Orbital Angular Momentum Optical Beams—A Review

Fatkhiev

Butt

Grakhova

et al. 2021

Sensors

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Herein, we have discussed three major methods which have been generally employed for the generation of optical beams with orbital angular momentum (OAM). These methods include the practice of diffractive optics elements (DOEs), metasurfaces (MSs), and photonic integrated circuits (PICs) for the production of in-plane and out-of-plane OAM. This topic has been significantly evolved as a result; these three methods have been further implemented efficiently by different novel approaches which are discussed as well. Furthermore, development in the OAM detection techniques has also been presented. We have tried our best to bring novel and up-to-date information to the readers on this interesting and widely investigated topic.

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Mechanisms of 2π phase control in dielectric metasurface and transmission enhancement effect

Cited by 34 publications

References 35 publications

All-Dielectric Huygens’ Metasurface for Wavefront Manipulation in the Visible Region

All-Dielectric Huygens’ Metasurface for Wavefront Manipulation in the Visible Region

All-Dielectric Phase-Gradient Metasurface Performing High-Efficiency Anomalous Transmission in the Near-Infrared Region

Recent Advances in Generation and Detection of Orbital Angular Momentum Optical Beams—A Review

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