Article
Physics, Multidisciplinary
Ahmed Nagaty, Arafa H. Aly, Walied Sabra
Summary: This paper explores the design of absorbers using plasmonic metasurfaces in the visible spectrum and presents a comparison between different nanoantennas. The results show that using titanium nitride nanoantennas in plasmonic metasurfaces achieves higher absorption compared to other nanoantennas. This technique provides a promising method for designing preoptimized absorbers for practical applications such as sensing, thermal management, and solar cells.
Article
Optics
Xiangkai Zeng, Daniel Rosenmann, David A. Czaplewski, Jie Gao, Xiaodong Yang
Summary: In this study, a mid-infrared chiral metasurface absorber with strong chiroptical effects and circular dichroism responses is designed and demonstrated. The absorption rate and CD value can be tuned by varying the geometric parameters of the metasurface, and a strong correlation between CD in absorption and temperature difference is observed.
OPTICS COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Geng-Bo Wu, Jun Yan Dai, Qiang Cheng, Tie Jun Cui, Chi Hou Chan
Summary: A 1-bit space-time-coding metasurface antenna can extract and mold guided waves into any desired free-space waves in both space and frequency domains.
NATURE ELECTRONICS
(2022)
Article
Optics
Chun-Chieh Chang, Shin-Chun Kuo, Hsyi-En Cheng, Hou-Tong Chen, Zu-Po Yang
Summary: By conformally coating plasmonic TiN films onto disordered AAO nanotemplates, we demonstrate TiN broadband metasurface perfect absorbers with polarization-insensitive and weak angle-dependent perfect absorption over the entire visible and near-infrared spectral regions. The light scattering induced by the strong disorder of the AAO nanopores and the strong absorption of the TiN deposited on their sidewall are critical for achieving broadband perfect absorption, making the TiN disordered metasurface perfect absorbers superior to many other types of broadband perfect absorbers previously reported.
Article
Materials Science, Multidisciplinary
Yuping Duan, Hao Lei, Lingxi Huang, Xinran Ma, Xuan Yang, Xingyang Sun, Ben Ma
Summary: This study presents a two-layer hierarchical structure that combines coating and a square patch-based metasurface, aiming to meet the demand for integrated radar and infrared camouflage. Experimental results show that under deep subwavelength thickness, the infrared stealth layer (IRSL) significantly enhances the performance of the microwave absorption layer (MAL), expanding the effective absorption bandwidth and increasing the reflection loss. Strong magnetic resonance is also observed in the coatings, controlled by low-pass filter metasurfaces.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Optics
Che Liu, Wen Ming Yu, Qian Ma, Lianlin Li, Tie Jun Cui
Summary: Intelligent coding metasurface is capable of manipulating electromagnetic waves and associating digital information simultaneously, showing promising applications. The proposed physics-driven variational auto-encoder cGAN, based on unsupervised conditional generative adversarial networks, offers an efficient approach to design intelligent coding metasurface holograms.
PHOTONICS RESEARCH
(2021)
Article
Multidisciplinary Sciences
Daquan Yang, Weiguang Wang, Erpeng Lv, Haiming Wang, Bingchao Liu, Yanzhao Hou, Jin-Hui Chen
Summary: A programmable vanadium dioxide metasurface is proposed for THz frequencies, which can switch between insulating and metallic states via external electrical stimulation, allowing for dynamic modulation of the electromagnetic response. By controlling the voltages of different columns, phase gradients are achieved for THz beam steering. Different coding methods offer varying degrees of optical phase control and improved diffraction efficiency.
Article
Materials Science, Multidisciplinary
Yujing Ran, Zhaotan Jiang, Zhi Wang
Summary: In this study, all-nitride perfect broadband metamaterial absorbers were designed and studied, which achieve high absorption performance within specific wavelength ranges and exhibit polarization independence and high absorption at large incidence angles. These all-nitride absorbers have promising potential in related applications.
RESULTS IN PHYSICS
(2022)
Article
Optics
Ziru Cai, Cuo Wu, Jing Jiang, Yingtao Ding, Ziwei Zheng, Fei Ding
Summary: This study introduces a tunable phase-change metasurface for switchable vector vortex beam generation in the mid-infrared range. By spatially orienting GST meta-molecules, phase and polarization distribution can be tailored to achieve a switchable vector vortex beam generator at the target wavelength of 5 µm.
Article
Physics, Applied
Ye Jeong Shin, Hong Min Seung, Joo Hwan Oh
Summary: What makes elastic waves different from other waves is the existence of various wave modes and coupling between these modes. In this study, fluid-like elastic metasurfaces were proposed to perfectly eliminate mode coupling. Strip-type unit cells were used to design and realize elastic metasurfaces mimicking acoustic hard-wall and soft-wall. Numerical analysis and experiments were conducted to prove the validity of the designed unit cells. This study presents a more versatile metasurface by solving the mode coupling of solid elastic waves, and the designed fluid-like metasurfaces can be further utilized in studies considering the opposite phase shift characteristic.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Yuanwei Li, Ibrahim Tanriover, Wenjie Zhou, Wisnu Hadibrata, Sina Abedini Dereshgi, Devleena Samanta, Koray Aydin, Chad A. Mirkin
Summary: A synthetic strategy for preparing ultrathin, broadband metasurface absorbers is reported, which involves the surface-assembly of plasmonic octahedral nanoframes into large-area ordered monolayers. The resulting absorbers exhibit efficient light absorption across a wide range of wavelengths and are unaffected by polarization and incidence angles.
Article
Materials Science, Multidisciplinary
J. P. del Risco, I. S. Mikhalka, V. A. Lenets, M. S. Sidorenko, A. D. Sayanskiy, S. B. Glybovski, A. L. Samofalov, S. A. Khakhomov, I. Semchenko, J. D. Ortiz, J. D. Baena
Summary: This work investigates the potential of achieving wide-angle perfect absorption with Huygens' metasurfaces possessing electric and magnetic responses. By analyzing the anisotropy of the polarizability tensor of the unit cell and identifying conditions for optimal angular stability and polarization independence, a Huygens' metasurface with low reflectance across a wide frequency range and total absorption around a single resonance frequency was approximated. Numerical demonstration of optimal angular stability and experimental validation of wide-angle and wide-band properties were conducted.
Article
Nanoscience & Nanotechnology
Wenjie Chen, Junjie Zhan, Yi Zhou, Rui Chen, Yubo Wang, Yungui Ma
Summary: The research proposes a comprehensive stealth technology that can simultaneously handle microwave absorption and adjustable visible and near-infrared spectra to adapt to different environments. The designed artificial coat can absorb over 80% energy in the X-band and its visible and near-infrared spectra can be electrically adjusted through an integrated emission system. This method could be extended to broader wave bands and has potential applications in multifunctional stealth technologies.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Jon W. Stewart, Tamra Nebabu, Maiken H. Mikkelsen
Summary: This study demonstrates a novel large-area embedded metasurface architecture that is environmentally robust and capable of spectrally selective absorption across a wide range. By using colloidal plasmonic nanoparticles with different crystallinities, materials, shapes, and sizes, these metasurfaces can be designed for various optical processes from UV to SWIR region.
Article
Materials Science, Multidisciplinary
E. M. Sheta, P. K. Choudhury, Abdel-Baset M. A. Ibrahim
Summary: An ultra-wideband metamaterial absorber consisting of a zirconium nitride (ZrN)-based metasurface was investigated. The study found that the metasurface with concentric annular resonating elements exhibited the best performance in terms of absorbance, with a stable wideband feature. The structure demonstrated nearly perfect absorption and polarization insensitivity, making it suitable for antireflection coatings and solar energy harvesting in a wide spectral range.
Article
Materials Science, Ceramics
Bo Zhang, Ibrahim Mahariq, Ngo Tran, Mustafa Z. Mahmoud, Majid Niaz Akhtar
Summary: A magnetic core-double shells structured composite has been developed to protect the core from oxidation and improve complex permittivity. The composite showed significant performance in terms of reflection loss and effective absorption bandwidth, with maximum dissipation capacity of -32.5 dB at 16.5 GHz. Enhancements in microwave dissipation arise from synergistic influences of various phenomena such as interfacial polarization and proper impedance matching.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Muhammad Yousaf, Shoaib Nazir, Muhammad Akbar, Majid Niaz Akhtar, Asma Noor, Enyi Hu, M. A. K. Yousaf Shah, Yuzheng Lu
Summary: In this study, rare earth-doped Gd oxide in mixed Co-Mn spinel ferrite nanoparticles was synthesized using a sol-gel autocombustion approach. The magnetic and electrical properties decreased with increasing Gd3+ ion content, but the samples exhibited semiconducting behavior.
CERAMICS INTERNATIONAL
(2022)
Article
Optics
Rana Muhammad Hasan Bilal, Muhammad Abuzar Baqir, Musab Hameed, Syed Aftab Naqvi, Muhammad Mahmood Ali
Summary: A metamaterial absorber based on triangular metallic rings is proposed in this paper to achieve wideband absorption in the wavelength range of 400-750 nm. The absorber exhibits stable absorption and polarization-insensitive behavior.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
(2022)
Article
Materials Science, Ceramics
Min Ji, Pengfei Ji, Sadok Mehrez, Sagr Alamri, Majid Niaz Akhtar
Summary: The current study describes the fabrication and analysis of a bi-layer microwave absorber made of magnetic Sr2FeReO6 (SRO) powder and a magnetoelectric nanocomposite formed of rod-like magnetic Sr2FeReO6 powder wrapped in polygonal SnS2 powder (SRSS). The analysis showed that successful synthesis of rod and polygonal particles with soft magnetic properties was achieved. The designed bi-layer absorber exhibited broad X-band frequency absorption capabilities, with a reflection loss of -33 dB at 10.3 GHz and a thickness of only 2.5 mm.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Muhammad Azhar Khan, Sohail Afzal, Shagufta Gulbadan, Khalid Mahmood, Ghulam Abbas Ashraf, Majid Niaz Akhtar
Summary: Nano-crystalline Gd-substituted X-type hexaferrites with different Gd concentrations were synthesized and their properties were studied. X-ray diffraction confirmed the single and pure phases of hexagonal ferrites. The dielectric properties showed frequency dependence and suggested potential applications in high-frequency devices and supercapacitors. Raman spectra and SEM images further supported the findings.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Electrical & Electronic
M. A. Baqir, P. K. Choudhury
Summary: A study was conducted on an optical biosensor based on hyperbolic metamaterial (HMM) for the detection of early-stage cancer cells. The effective medium theory was used to determine the properties of the metasurface. By analyzing the reflectance under different conditions, shifts in spectral minima were observed, allowing for the determination of the measurand's status. The sensitivity and figure-of-merit (FoM) of the structure were evaluated, showing that the device has a relatively high FoM that depends on various factors.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Subhan Zakir, Rana Muhammad Hasan Bilal, Muhammad Ashar Naveed, Muhammad Abuzar Baqir, Muhammad Usman Ali Khan, Muhammad Mahmood Ali, Muhammad Ahsan Saeed, Muhammad Qasim Mehmood, Yehia Massoud
Summary: Graphene-based metamaterials are used to develop a broadband absorber for terahertz radiation. The proposed absorber, a graphene meta-square ring with multiple plasmonic resonances, achieves over 95% absorption for normally incident waves and maintains over 80% absorption for obliquely incident waves. It is also polarization-insensitive and its absorption characteristics can be adjusted by changing the chemical potential of graphene. This proposed absorber has the largest reported bandwidth for a single layer absorber with a small footprint, making it suitable for various applications in the terahertz range.
IEEE PHOTONICS JOURNAL
(2023)
Article
Physics, Condensed Matter
Raees M. Asif, Abdul Aziz, Majid Niaz Akhtar, M. Amjad, Muhammad Azhar Khan
Summary: In this study, a Terbium doped Nickel-Zink nano-ferrite material was prepared and used as a substrate in a dual-band yagi-Uda-shaped 4 x 4 multi input multi output antenna. The properties of the ferrite material were evaluated using XRD, VSM, and SEM analysis. The MIMO antenna demonstrated improved performance in terms of size, bandwidth, isolation, and Channel Capacity Loss when compared to conventional FR4 substrates.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Chemistry, Physical
Song Zhao, Mohamad Reda A. Refaai, Sadeq Salman, Majid Niaz Akhtar, Kang Du
Summary: The study proposes a method of optimizing the structure and absorber thickness, and increases the absorption performance of the NiCo2S4/AgBr nanocomposite by modifying the filler loading in the composite matrix. The results show that the thinnest layer with a thickness of 1.4 mm has a minimum reflection loss of -24 dB at 9.7 GHz, and the absorption bandwidth is 3.8 GHz. The measurement of electromagnetic radiation patterns demonstrates strong high-frequency absorption responses at 10.9 GHz and 11.4 GHz for samples with 25 wt.% and 35 wt.% filler loading. The key factors in improving the reflection loss and absorption efficiency are excellent conductive response, better matching properties, and electromagnetic losses.
SURFACES AND INTERFACES
(2023)
Article
Physics, Multidisciplinary
Mohamad abou Houran, Muhammad Saqlain, Muhammad abuzar Baqir
Summary: This paper studies a metasurface-based ultraviolet absorber made of periodically arranged nanospheres of indium tin oxide (ITO). The absorber exhibits wideband absorptivity and is insensitive to different polarized waves. The absorption mechanism is well understood through the Fabry-Pe 'rot model and shows agreement with simulated work. This absorber has potential applications in photodetection conversion and ultraviolet protection.
Article
Thermodynamics
Mohamad Abou Houran, Ammar Armghan, Muhammad Abuzar Baqir, Khaled Aliqab, Muhammad Saqlain, Meshari Alsharari
Summary: This paper presents a wideband MXene-based metamaterial absorber made of subwavelength-sized periodic nanorods of MXene operating in the infrared regime. The absorber shows absorption of above 80% over a wide range, from 1150 to 2500 nm, due to localized surface plasmonic resonance (LSPR) of the top metasurface of periodic nanorods. The MXene-based optical absorber features a polarization-insensitive nature and demonstrates stable absorption for obliquity incident angles up to 50 degrees.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
Kanwal Majeed, Muhammad Azhar Khan, Raqiqa Tur Rasool, Shagufta Gulbadan, Abeer A. AlObaid, M. Irfan, Ghulam Abbas Ashraf, Ghazanfar Nazir, Majid Niaz Akhtar
Summary: Recently, nano-sized Z-type hexagonal ferrites with Indium substitution have been synthesized and shown to have excellent properties for microwave absorption and resolving EM pollution. These materials also have significant applications in EM interference shielding and radar cross-section reduction, making them suitable for stealth technology.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Physical
Majid Niaz Akhtar, Zainab Mufarreh Elqahtani, Sabih Qamar, Abdullah Almohammedi, M. Irfan, Muhammad Azhar Khan, Muhammad Yousaf, Atif Nazir, Yuzheng Lu, Mustafa Z. Mahmoud, Muhammad Aslam, Z. A. Alrowaili, M. S. Al-Buriahi
Summary: The absorption characteristics of Co, Cu, and Zn-doped Ni-Ce nano ferrites were investigated and it was found that the Zn-doped NiCe absorber showed excellent performance for Ku band absorption applications, making it suitable for next-generation multifunctional absorbers.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Physical
Xiaoli Wang, Ali Hassan, Mohamad Reda A. Refaai, Mahyuddin K. M. Nasution, Majid Niaz Akhtar
Summary: In the modern world, electromagnetic interference is a serious issue. To effectively prepare materials with excellent electromagnetic wave dissipation capabilities, researchers synthesized pompon-flower-like CoGd0.5Fe1.5O4 and sphere-like BiFeO3. The findings demonstrate that using BiFe as the first layer and CoGd as the second layer in a bi-layer absorber can improve impedance matching and achieve high absorption with a broad effective absorption bandwidth.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Physical
Majid Niaz Akhtar, Nissren Tamam, Sunder Makhdoom, M. A. Baqir, Mustafa Z. Mahmoud, Muhammad Yousaf, Muhammad Azhar Khan, M. Irfan, Z. A. Alrowaili, M. S. Al-Buriahi
Summary: In this study, Dy-Gd doped YIG nano ferrites with excellent absorbing power and low cost were prepared by a sol-gel self-ignition route. The effects of Dy-Gd on the structural and electromagnetic characteristics of YIG were evaluated using various characterization techniques. The results showed that Dy-Gd doped YIG ferrites exhibit promising performance for microwave absorption and electromagnetic shielding applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
