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Letteratura scientifica selezionata sul tema "All-Dielectric Metamaterial"

Autore: Grafiati

Pubblicato: 11 gennaio 2025

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Articoli di riviste sul tema "All-Dielectric Metamaterial"

1

Peng, Mengyue, Faxiang Qin, Liping Zhou, Huijie Wei, Zihao Zhu, and Xiaopeng Shen. "Material–structure integrated design for ultra-broadband all-dielectric metamaterial absorber." Journal of Physics: Condensed Matter 34, no. 11 (2021): 115701. http://dx.doi.org/10.1088/1361-648x/ac431e.

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Abstract Material and structure are the essential elements of all-dielectric metamaterials. Structure design for specific dielectric materials has been studied while the contribution of material and synergistic effect of material and structure have been overlooked in the past years. Herein, we propose a material–structure integrated design (MSID) methodology for all-dielectric metamaterials, increasing the degree of freedom in the metamaterial design, to comprehensively optimize microwave absorption performance and further investigate the contribution of material and structure to absorption. A dielectric metamaterial absorber with an ultra-broadband absorption from 5.3 to 18.0 GHz is realized. Theoretical calculation and numerical simulation demonstrate that the symphony of material and structure excites multiple resonance modes encompassing quarter-wavelength interference cancellation, spoof surface plasmon polariton mode, dielectric resonance mode and grating mode, which is essential to afford the desirable absorption performance. This work highlights the superiority of coupling of material and structure and provides an effective design and optimization strategy for all-dielectric metamaterial absorbers.

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2

Luo, Tianhuan, Bo Li, Qian Zhao, and Ji Zhou. "Dielectric Behavior of Low Microwave Loss Unit Cell for All Dielectric Metamaterial." International Journal of Antennas and Propagation 2015 (2015): 1–6. http://dx.doi.org/10.1155/2015/291234.

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With a deep study of the metamaterial, its unit cells have been widely extended from metals to dielectrics. The dielectric based unit cells attract much attention because of the advantage of easy preparation, tunability, and higher frequency response, and so forth. Using the conventional solid state method, we prepared a kind of incipient ferroelectrics (calcium titanate, CaTiO3) with higher microwave permittivity and lower loss, which can be successfully used to construct metamaterials. The temperature and frequency dependence of dielectric constant are also measured under different sintering temperatures. The dielectric spectra showed a slight permittivity decrease with the increase of temperature and exhibited a loss of 0.0005, combined with a higher microwave dielectric constant of ~167 and quality factorQof 2049. Therefore, CaTiO3is a kind of versatile and potential metamaterial unit cell. The permittivity of CaTiO3at higher microwave frequency was also examined in the rectangular waveguide and we got the permittivity of 165, creating a new method to test permittivity at higher microwave frequency.

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3

Fan, Wen, Bing Yan, Zengbo Wang, and Limin Wu. "Three-dimensional all-dielectric metamaterial solid immersion lens for subwavelength imaging at visible frequencies." Science Advances 2, no. 8 (2016): e1600901. http://dx.doi.org/10.1126/sciadv.1600901.

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Although all-dielectric metamaterials offer a low-loss alternative to current metal-based metamaterials to manipulate light at the nanoscale and may have important applications, very few have been reported to date owing to the current nanofabrication technologies. We develop a new “nano–solid-fluid assembly” method using 15-nm TiO2 nanoparticles as building blocks to fabricate the first three-dimensional (3D) all-dielectric metamaterial at visible frequencies. Because of its optical transparency, high refractive index, and deep-subwavelength structures, this 3D all-dielectric metamaterial-based solid immersion lens (mSIL) can produce a sharp image with a super-resolution of at least 45 nm under a white-light optical microscope, significantly exceeding the classical diffraction limit and previous near-field imaging techniques. Theoretical analysis reveals that electric field enhancement can be formed between contacting TiO2 nanoparticles, which causes effective confinement and propagation of visible light at the deep-subwavelength scale. This endows the mSIL with unusual abilities to illuminate object surfaces with large-area nanoscale near-field evanescent spots and to collect and convert the evanescent information into propagating waves. Our all-dielectric metamaterial design strategy demonstrates the potential to develop low-loss nanophotonic devices at visible frequencies.

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4

Bi, Ke, Qingmin Wang, Jianchun Xu, Lihao Chen, Chuwen Lan, and Ming Lei. "All‐Dielectric Metamaterial Fabrication Techniques." Advanced Optical Materials 9, no. 1 (2020): 2001474. http://dx.doi.org/10.1002/adom.202001474.

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5

Kivshar, Yuri. "All-dielectric meta-optics and non-linear nanophotonics." National Science Review 5, no. 2 (2018): 144–58. http://dx.doi.org/10.1093/nsr/nwy017.

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Abstract Most optical metamaterials fabricated and studied to date employ metallic components resulting in significant losses, heat and overall low efficiencies. A new era of metamaterial physics is associated with all-dielectric meta-optics, which employs electric and magnetic Mie resonances of subwavelength particles with high refractive index for an optically induced magnetic response, thus underpinning a new approach to design and fabricate functional and practical metadevices. Here we review the recent developments in meta-optics and subwavelength dielectric photonics and demonstrate that the Mie resonances can play a crucial role in the realization of the unique functionalities of meta-atoms, also driving novel effects in the fields of metamaterials and nanophotonics. We discuss the recent research frontiers in all-dielectric meta-optics and uncover how Mie resonances can be employed for a flexible control of light with full phase and amplitude engineering, including unidirectional metadevices, highly transparent metasurfaces, non-linear nanophotonics and topological photonics.

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6

Wang, Jun, Shaobo Qu, Liyang Li, et al. "All-dielectric metamaterial frequency selective surface." Journal of Advanced Dielectrics 07, no. 05 (2017): 1730002. http://dx.doi.org/10.1142/s2010135x1730002x.

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Frequency selective surface (FSS) has been extensively studied due to its potential applications in radomes, antenna reflectors, high-impedance surfaces and absorbers. Recently, a new principle of designing FSS has been proposed and mainly studied in two levels. In the level of materials, dielectric materials instead of metallic patterns are capable of achieving more functional performance in FSS design. Moreover, FSSs made of dielectric materials can be used in different extreme environments, depending on their electrical, thermal or mechanical properties. In the level of design principle, the theory of metamaterial can be used to design FSS in a convenient and concise way. In this review paper, we provide a brief summary about the recent progress in all-dielectric metamaterial frequency selective surface (ADM-FSS). The basic principle of designing ADM-FSS is summarized. As significant tools, Mie theory and dielectric resonator (DR) theory are given which illustrate clearly how they are used in the FSS design. Then, several design cases including dielectric particle-based ADM-FSS and dielectric network-based ADM-FSS are introduced and reviewed. After a discussion of these two types of ADM-FSSs, we reviewed the existing fabrication techniques that are used in building the experiment samples. Finally, issues and challenges regarding the rapid fabrication techniques and further development aspects are discussed.

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7

Lepetit, T., É Akmansoy, M. Paté, and J. P. Ganne. "Broadband negative magnetism from all-dielectric metamaterial." Electronics Letters 44, no. 19 (2008): 1119. http://dx.doi.org/10.1049/el:20081447.

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8

Sifat, Abid Anjum, Ayed Al Sayem, and M. Mahmudul Hasan Sajeeb. "All dielectric metamaterial loaded tunable plasmonic waveguide." AIP Advances 7, no. 8 (2017): 085312. http://dx.doi.org/10.1063/1.4989528.

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9

Shankhwar, Nishant, Yogita Kalra, Qiang Li, and Ravindra Kumar Sinha. "Zero-index metamaterial based all-dielectric nanoantenna." AIP Advances 9, no. 3 (2019): 035115. http://dx.doi.org/10.1063/1.5086234.

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10

Moitra, Parikshit, Brian A. Slovick, Wei li, et al. "Large-Scale All-Dielectric Metamaterial Perfect Reflectors." ACS Photonics 2, no. 6 (2015): 692–98. http://dx.doi.org/10.1021/acsphotonics.5b00148.

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