Готові списки джерел за темами / Absorbing metasurface

Добірка наукової літератури з теми "Absorbing metasurface"

Автор: Grafiati

Опубліковано: 6 вересня 2023

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Статті в журналах з теми "Absorbing metasurface"

Liu, Kai, Suhua Jiang, Dengxin Ji, Xie Zeng, Nan Zhang, Haomin Song, Yun Xu, and Qiaoqiang Gan. "Super Absorbing Ultraviolet Metasurface." IEEE Photonics Technology Letters 27, no. 14 (July 15, 2015): 1539–42. http://dx.doi.org/10.1109/lpt.2015.2428621.

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Mitrofanov, Oleg, and Igal Brener. "All-dielectric photoconductive metasurfaces for terahertz applications." Photoniques, no. 101 (March 2020): 47–52. http://dx.doi.org/10.1051/photon/202010147.

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We review applications of all-dielectric metasurfaces for one of the cornerstone technologies in THz research – ultrafast photoconductive (PC) switches – which are widely used as sources and detectors of broadband THz pulses. Nanostructuring the PC switch channel as a perfectly-absorbing and optically thin PC metasurface allows us to engineer the optical as well as the electronic properties of the channel and improve the efficiency of THz detectors. This approach also opens new routes for employing novel PC materials and enabling new device architectures including THz detector arrays.

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Meng, Fan-Guang, Hao Li, Di-Gang Fan, Fei-Fei Li, Feng-Zhi Xue, Ping Chen, and Rui-Xin Wu. "Transmitting-absorbing material based on resistive metasurface." AIP Advances 8, no. 7 (July 2018): 075008. http://dx.doi.org/10.1063/1.5037772.

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Jing, Yun, and Jun Ji. "Optimization on metasurface-enabled sound absorbing panels." Journal of the Acoustical Society of America 146, no. 4 (October 2019): 2829. http://dx.doi.org/10.1121/1.5136802.

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Donda, Krupali, Yifan Zhu, Shi-Wang Fan, Liyun Cao, Yong Li, and Badreddine Assouar. "Extreme low-frequency ultrathin acoustic absorbing metasurface." Applied Physics Letters 115, no. 17 (October 21, 2019): 173506. http://dx.doi.org/10.1063/1.5122704.

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Li, Junfei, Wenqi Wang, Yangbo Xie, Bogdan Popa, and Steven A. Cummer. "A sound absorbing metasurface with coupled resonators." Journal of the Acoustical Society of America 140, no. 4 (October 2016): 2959. http://dx.doi.org/10.1121/1.4969138.

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Bychanok, D., S. Li, G. Gorokhov, K. Piasotski, D. Meisak, P. Kuzhir, E. A. Burgess, et al. "Fully carbon metasurface: Absorbing coating in microwaves." Journal of Applied Physics 121, no. 16 (April 28, 2017): 165103. http://dx.doi.org/10.1063/1.4982232.

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Siday, Thomas, Polina P. Vabishchevich, Lucy Hale, Charles Thomas Harris, Ting Shan Luk, John L. Reno, Igal Brener, and Oleg Mitrofanov. "Terahertz Detection with Perfectly-Absorbing Photoconductive Metasurface." Nano Letters 19, no. 5 (April 4, 2019): 2888–96. http://dx.doi.org/10.1021/acs.nanolett.8b05118.

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Li, Junfei, Wenqi Wang, Yangbo Xie, Bogdan-Ioan Popa, and Steven A. Cummer. "A sound absorbing metasurface with coupled resonators." Applied Physics Letters 109, no. 9 (August 29, 2016): 091908. http://dx.doi.org/10.1063/1.4961671.

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Kumar, Pankaj, Akhlesh Lakhtakia, and Pradip K. Jain. "Tricontrollable pixelated metasurface for absorbing terahertz radiation." Applied Optics 58, no. 35 (December 2, 2019): 9614. http://dx.doi.org/10.1364/ao.58.009614.

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Дисертації з теми "Absorbing metasurface"

Roy, Aritra. "Design of Compact Antennas With Metasurface for Wideband and Wireless Applications." Thesis, 2022. https://etd.iisc.ac.in/handle/2005/6034.

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Анотація:

An antenna is one of the essential elements in a wireless system, that converts the guided waves in an electronic circuit to unguided waves in the air and vice versa. They are often designed according to the specifications of the underlying system. Compact antennas are required in miniaturised systems such as those used in an aircraft. They are designed by modifying or appending the antenna with additional structures or circuit elements without degrading its responses. In this thesis, the design of compact antennas is investigated with metasurface for two unique purposes - i. wideband applications for detection/sensing application, and ii. spatial modulation to communicate a multipath environment. For wideband applications, a spiral antenna is considered a primary radiator due to its wideband impedance matching and circular polarization (CP) response with simple and planar geometry. It has a bidirectional radiation pattern on either side of the structure, along the axis of the antenna. But in many practical applications, a single-sided radiation pattern is extracted by placing it above a metallic body of a ship or aircraft, which disturbs the freestanding radiation response of the antenna. A conductor placed more than half a wavelength away from the spiral reduces the boresight gain significantly at high frequency, whereas the same placed too close to the antenna degrades the matching and polarization performance at low frequency. These issues have been addressed over years with different techniques, but the design of compact spiral still possesses significant challenges especially when a frequency band of 1-18~GHz is considered. As this research work begins, the spiral is placed at different heights above a metallic conductor and the effects are observed over the considered frequency range. It is followed by an investigation with profiled metallic geometries to combine the benefits of varying antenna heights at different frequencies. Based on these observations, a compact spiral antenna is designed by placing it above a modified conical conductive backing to radiate a CP wave over a wide frequency band. In the next part of this thesis, some of the challenges at low frequencies are addressed using different absorber techniques when the spiral is kept extremely close to a conductor. A hybrid technique consisting of absorbing material and resistors is proposed to design such a compact spiral antenna for wideband application. To improve the performance below 2~GHz, a wideband metasurface absorber is investigated with the spiral. The metasurface possesses significant electromagnetic absorption at low frequency and has been used to design a spiral antenna for 1-18~GHz with an extremely low profile. Another work with a compact spiral antenna approaches to tilt its main beam over a wide frequency range. This investigation is required to compensate for the shift in the antenna main beam due to the supporting structure or to tilt the antenna main beam in a given direction for different purposes. A semicircular lens made of lossy dielectric material is placed above a compact spiral to fulfil this requirement. Effects of different material properties and lens profiles are investigated to arrive at the final design. Since placing the lens along the spiral affects the compactness of the antenna and disturbs the planar profile required in a flush mounting configuration, a sectoral metasurface is designed and printed on the backside of the antenna substrate. The metasurface possesses effective material properties to tilt the antenna main beam at a consistent angle. For all cases, numerical investigations were carried out to optimize the antenna geometries followed by prototyping and characterization of some of these structures. The measured results are compared with the simulated outcomes and the numerical predictions have been verified. This required the design and realization of a wideband balun and appropriate fixtures to integrate various parts of this antenna in a flush-mount arrangement. For a unique wireless application with a compact antenna, a digitally reconfigurable metasurface in the vicinity of a patch antenna is proposed, to realize for the first time a modulator for a spatial modulation technique known as media-based modulation (MBM). MBM facilitates a fast, secure, and multiuser wireless link in a multipath environment (e.g., indoor or office environments) by exploiting the multipath components of the channel. The metasurface works as an electromagnetic window as the power flowing through the unit cell can be electronically controlled by switching a PIN diode embedded within. A significant difference in transmission coefficient is observed between the two switching states of the unit cell. A meander geometry is used to make it compact and the diode is placed between the meander and one of the two contiguous strips that provides the necessary biasing to the diode. Numerical investigations are carried out to characterize the unit cell, and to optimize the array dimensions and the gap between metasurface and antenna. A prototype of the array is fabricated with the necessary control circuitry and a complete wireless link is set up to communicate in a real-time environment. Experiments are carried out in different scatter free and scattering environments in line of sight and non-line of sight configurations to validate the theoretical predictions of MBM. The effects of multipath as a factor that improves communication performance are also validated. In the end, data transmission over a wireless link is also demonstrated using this scheme.
Ministry of Education, Govt. of India and Thales Defence Mission Systems

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Частини книг з теми "Absorbing metasurface"

Das, Hrishit Mohan, Syed Tabassum Nazeer, Shrikrishan Baghel, Vineetha Joy, and Hema Singh. "Metasurface-Based Tunable Radar Absorbing Structure for Broadband Applications." In VLSI, Communication and Signal Processing, 873–86. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-0973-5_67.

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Sim, Man Seng, Kok Yeow You, Fahmiruddin Esa, and Fandi Hamid. "Metamaterials and Metasurfaces for Radio-Frequency Energy Harvesting Applications." In Advances in Wireless Technologies and Telecommunication, 270–96. IGI Global, 2023. http://dx.doi.org/10.4018/978-1-6684-8287-2.ch011.

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In ambient energy harvesting applications, metamaterials and metasurfaces are useful in localizing and absorbing energy from the surroundings. This chapter reviews past achievements, recent developments and future trends in metamaterial-based radio-frequency (RF) energy harvesters. The chapter begins by introducing metamaterial energy harvesters from a general perspective, covering mechanical, acoustic, and electromagnetic metamaterial energy harvesters. The subsequent section focuses specifically on the working principle of electromagnetic metamaterial energy harvesters in the RF regime. To enhance understanding of the absorption mechanism and performance evaluation, a simulation of an Omega-ring-shaped metamaterial harvester operating at a frequency of 5.8 GHz is demonstrated. The absorption efficiency, harvesting efficiency, and conversion efficiency of the metamaterial harvester are determined and discussed. Furthermore, the state-of-the-art design of metamaterial RF harvesters and their respective performance are reviewed.

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Chen, Pai-Yen, Mohamed Farhat, Zhilu Ye, Muhammad Amin, Hakan Bagci, and Danilo Erricolo. "Artificial Surfaces and Media for Electromagnetic Absorption and Interference Shielding." In Recent Topics in Electromagnetic Compatibility. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.99338.

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The rapid advent of radio-frequency (RF) and microwave technologies and systems have given rise to serious electromagnetic pollution, interference and jamming for high-precision detection devices, and even threats to human health. To mitigate these negative impacts, electromagnetic interference (EMI) shielding materials and structures have been widely deployed to isolate sophisticated instruments or human settlements from potential EMI sources growing every day. We discuss recent advances in lightweight, low-profile electromagnetic absorbing media, such as metamaterials, metasurfaces, and nanomaterial-based solutions, which may provide a relatively easy solution for EMI shielding and suppressing unwanted RF and microwave noises. We present a general review of the recent progress on theories, designs, modeling techniques, fabrication, and performance comparison for these emerging EMI and electromagnetic compatibility (EMC) media.

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Тези доповідей конференцій з теми "Absorbing metasurface"

Kossifos, K. M., M. A. Antoniades, J. Georgiou, A. H. Jaafar, and N. T. Kemp. "An Optically-Programmable Absorbing Metasurface." In 2018 IEEE International Symposium on Circuits and Systems (ISCAS). IEEE, 2018. http://dx.doi.org/10.1109/iscas.2018.8351874.

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Liu, Ziqi, Nozhan Bayat, and Puyan Mojabi. "On Microwave Imaging with Absorbing Metasurface Enclosure." In 2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting. IEEE, 2020. http://dx.doi.org/10.1109/ieeeconf35879.2020.9329652.

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Kabanov, I. N., V. V. Komarov, and V. P. Meshanov. "Ultra-thin absorbing metasurface of millimeterwave range." In 2016 International Conference on Actual Problems of Electron Devices Engineering (APEDE). IEEE, 2016. http://dx.doi.org/10.1109/apede.2016.7878894.

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Hale, Lucy, Tom Siday, Polina P. Vabishchevich, Charles Thomas Harris, Ting Shan Luk, John L. Reno, Igal Brener, and Oleg Mitrofanov. "Efficient Terahertz Detection with Perfectly-Absorbing Metasurface." In 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). IEEE, 2019. http://dx.doi.org/10.1109/irmmw-thz.2019.8874412.

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Saadabad, Reza Masoudian, Lujun Huang, and Andrey E. Miroshnichenko. "Super Absorbing Germanium Metasurface with quasi-Bound States in the Continuum." In Conference on Lasers and Electro-Optics/Pacific Rim. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/cleopr.2022.cfa8g_01.

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Germanium is the proper material for fiber-optic communication due to low-intrinsic dissipative losses at the telecommunication C-band. But specific applications need stronger absorption. We demonstrate super-absorbing germanium metasurfaces designed by quasi-bound states in the continuum.

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Chen, Yu, Zhangjie Luo, Xueyao Ren, and Tie Jun Cui. "A Rectifying Circuit Realizing the Nonlinearity of an Absorbing Metasurface." In 2022 IEEE MTT-S International Wireless Symposium (IWS). IEEE, 2022. http://dx.doi.org/10.1109/iws55252.2022.9977475.

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Xiong, Liangwei, Pengjun Chai, Ao Fu, Yufeng Fu, Ruiyang Tan, and Ping Chen. "Design of a Multifunctional Metasurface with Frequency-selective Absorbing Properties." In 2023 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM). IEEE, 2023. http://dx.doi.org/10.1109/iwem58222.2023.10234882.

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Luo, Zhangjie, Liu Zhao, Changjiang Xue, and Daniel Sievenpiper. "An electrically tunable absorbing metasurface for surface waves and plane waves." In 2016 Asia-Pacific Microwave Conference (APMC). IEEE, 2016. http://dx.doi.org/10.1109/apmc.2016.7931456.

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Zhou, Jia-Qi, Hao-Ran Zu, Bian Wu, Mao-Song Wu, and Liang Chen. "Design of transparent and low RCS antenna based on absorbing metasurface." In 2019 International Applied Computational Electromagnetics Society Symposium - China (ACES). IEEE, 2019. http://dx.doi.org/10.23919/aces48530.2019.9060680.

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Li, Tong, Qi Li, Huanhuan Yang, Sijia Li, Lili Cong, Jia Lu, Zexu Guo, and Xiangyu Cao. "Influence of Varactor-Loading Manners on the Absorbing Performance of Active Metasurface." In 2022 IEEE 10th Asia-Pacific Conference on Antennas and Propagation (APCAP). IEEE, 2022. http://dx.doi.org/10.1109/apcap56600.2022.10069655.

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