Article
Optics
Baoku Wang, Ke Gai, Ruoxing Wang, Fei Yan, Li Li
Summary: This paper presents an interesting scheme of an ultra-broadband perfect terahertz (THz) absorber using a periodic-conductivity graphene metasurface. By modulating the conductivity of graphene in a periodic manner, the absorber can generate dense high-order resonance modes and achieve ultra-broadband continuous absorption. This scheme is significant for the development of broadband THz absorbers and has promising application prospects in THz stealth, imaging, and communication fields.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Zhipeng Ding, Wei Su, Hong Wu, Wenlong Li, Yuanhang Zhou, Lipeng Ye, Hongbing Yao
Summary: This article proposes a novel single-layered graphene metasurface absorber (GMSA) that achieves thinness, lightness, broadband, high absorption, and tunability. The GMSA differs from common hybrid patterns by adopting a graphene layer with a simple multi-square ring structure. The simulation results show that the GMSA can achieve broadband absorption in the terahertz frequency range, making it suitable for various applications.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Multidisciplinary Sciences
Nanli Mou, Bing Tang, Jingzhou Li, Hongxing Dong, Long Zhang
Summary: Researchers have developed a thermally switchable terahertz metasurface that can achieve high transmission and ultra-broadband absorption at different temperatures, making it insensitive to the incident angle. The structure is highly scalable and has potential applications in areas such as optical switching, terahertz imaging, and filtering.
SCIENTIFIC REPORTS
(2022)
Article
Green & Sustainable Science & Technology
Ahsan Sarwar Rana, Muhammad Zubair, Yifan Chen, Zeng Wang, Jie Deng, Muhammad Tariq Saeed Chani, Aaron Danner, Jinghua Teng, Muhammad Qasim Mehmood
Summary: We report the experimental results of a broadband metasurface solar absorber composed of refractory material chromium. The absorber exhibits high broadband absorptance and has the advantages of resistance to oxidation and corrosion, low cost, and stability at higher temperatures.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Yan Liu, Rui Huang, Zhengbiao Ouyang
Summary: This study presents a graphene metamaterial and STO-based terahertz absorber with tunable and switchable bifunctionality, allowing for broadband absorption and narrowband absorption functionalities with high absorption rates and performance.
Article
Nanoscience & Nanotechnology
Yuwei Huang, Kelson Kaj, Chunxu Chen, Zhiwei Yang, Sheikh Rubaiat Ul Haque, Yuan Zhang, Xiaoguang Zhao, Richard D. Averitt, Xin Zhang
Summary: This article introduces a thin membrane silicon metasurface absorber that achieves very high absorption over a bandwidth of approximately 500 GHz. The absorber can be used in terahertz devices such as detectors, modulators, and switches.
Article
Materials Science, Multidisciplinary
Zhipeng Ding, Wei Su, Yinlong Luo, Lipengan Ye, Hong Wu, Hongbing Yao
Summary: A machine learning approach based on the random forest algorithm is proposed to predict the absorption bandwidth and structural parameters for designing PGMA, reducing the need for unnecessary numerical simulation and spectra analysis time.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Optics
Ekin Bircan Bosdurmaz, Hodjat Hajian, Veysel Ercaglar, Ekmel Ozbay
Summary: Graphene-based metasurface nearly perfect absorbers (MPAs) can efficiently control and manipulate waves in the terahertz (THz) gap. With a simple design, this novel MPA can absorb THz radiation within a broad bandwidth of almost 3 THz with polarization-insensitive and omnidirectional characteristics. The potential applications of this MPA in THz spectroscopy and communications are promising.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2021)
Article
Engineering, Electrical & Electronic
Zhenyan Wei, Yannan Jiang, Shitian Zhang, Xiuqin Zhu, Qingliang Li
Summary: This study proposes a broadband absorber based on graphene and one-dimensional photonic crystal to achieve magnetically tunable broadband absorption in the terahertz frequency range. The performance analysis demonstrates that the proposed absorber operates in a wide frequency range with high absorption, and can be dynamically tuned by varying the magnetic field.
IEEE PHOTONICS JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Jun Zhu, Changsong Wu, Yihong Ren
Summary: The study proposed a metamaterial absorber composed of graphene, and demonstrated that dynamic tuning of the absorption range and absorption bandwidth could be achieved by adjusting the Fermi level of the graphene. This has theoretical and engineering significance in the domains of thermal photo-voltaics, solar cells, and sensors.
RESULTS IN PHYSICS
(2021)
Article
Optics
Jingxuan Lan, Rongxuan Zhang, Hao Bai, Caidie Zhang, Xu Zhang, Wei Hu, Lei Wang, Yanqing Lu
Summary: In this study, a low-cost broadband tunable THz absorber based on one-step laser-induced graphene (LIG) was proposed, achieving over 90% absorption from 0.5 THz to 2 THz with optimized parameters.
CHINESE OPTICS LETTERS
(2022)
Article
Optics
Zhipeng Ding, Wei Su, Hong Wu, Hongbing Yao
Summary: In this study, a compact double-layer graphene metasurface absorber (GMSA) was designed to achieve control over the absorption window and intensity. Mechanistic analysis revealed that the proposed structure enables a tunable shift from low-frequency broadband absorption (L-BA) to high-frequency broadband absorption (H-BA) within 4.47 THz, with independently adjustable absorption intensities for both states. Additionally, the structure exhibited excellent broadband absorption performance for TE and TM-polarized waves at oblique incidence angles of 60 degrees. These findings highlight the potential of the proposed GMSA for detection, imaging, and object cloaking in the THz regime.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Shreyas Charola, Shobhit K. Patel, Juveriya Parmar, Rajendrasinh Jadeja
Summary: We proposed an angle insensitive and broadband I-shaped metasurface-based resonator to enhance absorption in the visible region. By carefully selecting the structure parameters, a wideband absorption of more than 95% from 550 to 651THz is achieved. The absorber is simple in design and insensitive to oblique incidences, making it suitable for applications in solar cells and photonics sensors.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Physics, Multidisciplinary
Dan Hu, Tian-Hua Meng, Hong-Yan Wang, Mai-Xia Fu
Summary: The designed tunable metamaterial absorber demonstrated dual-broadband high absorption properties at terahertz frequencies, with absorption rates reaching over 90%. By adjusting the graphene chemical potential, the absorptivity can be dynamically controlled from less than 10% to nearly 100%. The absorber is polarization-insensitive and robust to incident angles, showing potential for applications in THz imaging, modulating, filtering, etc.
Article
Materials Science, Multidisciplinary
Runhua Zhou, Tingting Jiang, Zhen Peng, Zhenyuan Li, Min Zhang, Shixing Wang, Ling Li, Huawei Liang, Shuangchen Ruan, Hong Su
Summary: The tunable broadband terahertz absorber designed in this paper consists of graphene, silica medium, and phase change material Vanadium dioxide (VO2). By adjusting the parameters of the absorber, different absorption rates can be achieved within different frequency ranges. This absorber can be widely used in fields such as THz tunable filters, sensors, switches, and modulators due to its large tunability.
Article
Engineering, Electrical & Electronic
Shobhit K. Patel, Sunil P. Lavadiya, Juveriya Parmar, Sudipta Das, Kawsar Ahmed, Sofyan A. Taya
Summary: This article presents an innovative and simple method for achieving broadband frequency reconfigurable antenna structure using low-cost materials and a compact design. The frequency reconfigurability is achieved through the OFF and ON mechanisms of three PIN diodes, and various performance observations are conducted to evaluate its effectiveness. The design proves to be suitable for different applications in the X frequency band, with a wide broadband frequency tunability of 2.5 GHz.
INTERNATIONAL JOURNAL OF MICROWAVE AND WIRELESS TECHNOLOGIES
(2023)
Article
Engineering, Electrical & Electronic
Jahid Tanvir, Sumaiya Akhtar Mitu, Shaymaa R. R. Tahhan, Kawsar Ahmed, Francis M. M. Bui, Shobhit K. K. Patel, Fahad Ahmed Al-Zahrani
Summary: In this study, a Hollow-Core Anti-Resonant Fiber (HC-ARF) for gas sensing purposes with ultra-high sensitivity responses is investigated. The optimized structure contains a large hollow core and six thin-walled capillaries, and the sensor also shows very low loss profiles. The fiber core supports fundamental modes as well as Higher Order Modes, but it has a good Higher Order Mode suppression ratio (HOMER) response. Bending the fiber introduces sensitivity drops.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Engineering, Biomedical
Shobhit K. Patel, Jaymit Surve, Juveriya Parmar, Kawsar Ahmed, Francis M. Bui, Fahad Ahmed Al-Zahrani
Summary: This century has seen the emergence of deadly and infectious diseases like influenza virus, Ebola virus, Zika virus, and the highly infectious SARS-CoV-2 (COVID-19), leading to epidemics and pandemics worldwide. Early detection of these viruses is crucial in saving lives, as some of them lack proper medications and vaccines. Although vaccines are available for COVID-19, new variants like Delta and Omicron are spreading rapidly. Existing virus detection techniques are time-consuming, expensive, and prone to false results. Biosensors offer a promising solution to this challenge, providing efficient and cost-effective early-stage illness detection. They have broad applications in healthcare, wearable electronics, safety, environment, military, and agriculture. This systematic review aims to summarize recent advancements in biosensor-based detection of pandemic viruses, including COVID-19, to assist fellow researchers in developing adaptable virus biosensors.
IEEE REVIEWS IN BIOMEDICAL ENGINEERING
(2023)
Article
Engineering, Electrical & Electronic
Abdulkarem H. M. Almawgani, Mya Mya Htay, Anwar A. H. Al-Athwary, Shobhit K. Patel
Summary: This study presents a solar absorber using a slotted resonator of Zirconium (Zr) over the Titanium (Ti) ground plane. The absorber demonstrates high absorptance over a broad wavelength range and exhibits insensitivity to angle of incidence. It shows potential for various solar energy harvesting applications.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Abdulkarem H. M. Almawgani, Mya Mya Htay, Jaymit Surve, Ammar Armghan, Khaled Aliqab, Shobhit K. K. Patel
Summary: This research focuses on the exploration of a solar absorber that can achieve broadband absorption for applications like photovoltaics. By using a Zirconium resonator and Germanium substrate, the absorber achieves absorption rates exceeding 95% for a bandwidth of 1800 nm and over 98% for a bandwidth of 1230 nm from 0.2 to 1.43 μm. It also achieves high absorption rates at specific wavelengths and is polarization-insensitive with a large angular tolerance.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Shobhit K. Patel, Dhruvik Agravat, Osamah Alsalman, Jaymit Surve, Sofyan A. Taya, Juveriya Parmar
Summary: Absorbing radiation from space remains a major challenge and ongoing research is being conducted in this field. This study investigates thick film structures for absorbing radiation, specifically proposing a three-layer structure that demonstrates almost similar absorption over the full spectral range. The proposed structure achieves over 98.09% absorption over the entire spectrum, with a maximum absorption of 98.36% for a wavelength range of 2800 nm and a minimum absorption of 98.09% for a 200 nm wavelength range. The structure exhibits almost 98.09% absorption with a wavelength variation of +/-0.27%. Thick film structures offer easy fabrication and require fewer materials, making them suitable for low-cost devices with applications in various technologies.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Chemistry, Analytical
Sumaiya Akhtar Mitu, Kawsar Ahmed, Francis M. Bui, Li Chen, Lassaad K. Smirani, Shobhit K. Patel, Vishal Sorathiya
Summary: Human tooth functionality is crucial for overall health, but diseases in teeth can lead to severe health issues. A spectroscopy-based photonic crystal fiber sensor was used to detect dental disorders in humans. By analyzing the sensor structure, it was found that it could accurately identify tooth problems.
Article
Materials Science, Multidisciplinary
Jacob Wekalao, Shobhit K. Patel, N. K. Anushkannan, Osamah Alsalman, Jaymit Surve, Juveriya Parmar
Summary: This paper discusses the design of a sensor for early stage malaria detection that is highly sensitive and effective. By modifying the interactions between light and matter, a graphene metasurface sensor is developed and optimized to achieve the highest levels of sensitivity for malaria detection. The goal is to create an inexpensive and highly effective sensor for malaria early detection in resource-constrained environments.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Thermodynamics
Shobhit K. Patel, Bo Bo Han, Osamah Alsalman, Sofyan A. Taya, Juveriya Parmar
Summary: We have developed a solar absorber based on Tungsten material with higher absorptance using multi-layers Titanium (Ti)-Silicon (Si). The absorptance was calculated for six peak wavelengths between 0.2-3 mu m. The solar absorptance was significantly improved with a multi-layered structure, reaching above 97% at 800 nm. This solar absorber has the potential to be used in various applications, from individual home facilities to large industries.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Physics, Applied
Abdulkarem H. M. Almawgani, Sofyan A. Taya, Mariam A. Abutailkh, Khedr M. Abohassan, Ayman Taher Hindi, Ilhami Colak, Amrindra Pal, Shobhit K. Patel
Summary: This paper investigates the numerical analysis of a highly performed surface plasmon resonance (SPRE)-based sensor employing a hybrid structure of SrTiO3 (STO) and graphene for rapid detection of malaria. The investigation is performed using the angular interrogation technique and transfer matrix method. The proposed SPRE sensor can achieve a sensitivity of 278.378, 227.027 and 400 degrees/RIU for Schizont, Trophozoite and Ring malaria stages, demonstrating its potential for biomedical applications.
MODERN PHYSICS LETTERS B
(2023)
Article
Chemistry, Physical
Jacob Wekalao, Osamah Alsalman, N. A. Natraj, Jaymit Surve, Juveriya Parmar, Shobhit K. Patel
Summary: The COVID-19 pandemic has highlighted the importance of fast and accurate virus detection techniques. In this paper, a novel graphene metasurface sensor is proposed for effective COVID-19 detection. The sensor leverages the plasmonic characteristics of graphene metasurfaces to detect specific COVID-19-related biomarkers.
Article
Chemistry, Physical
Malek G. Daher, Naser M. Ahmed, Osamah Alsalman, Abinash Panda, Ahmed Nabih Zaki Rashed, Juveriya Parmar, Sofyan A. Taya, Shobhit K. Patel
Summary: To create a sucrose detector that is quick, precise, and sensitive, this study employs a surface plasmon resonance biosensor (SPRB) for the determination of sucrose concentration. By inserting a Si layer, the sensitivity of the SPRB is improved, allowing for a substantial shift in the resonance angle due to a small change in the analyte's refractive index. With optimized thicknesses of the Ag, Si, and BP sheets, the suggested SPRB achieves an extraordinarily high sensitivity of 322.66°/RIU, making it ideal for various biosensing applications.
Article
Chemistry, Physical
Shobhit K. Patel, Bo Bo Han, N. K. Anushkannan, Jaymin Bhalani, Abdulkarem H. M. Almawgani, Yahya Ali Abdelrahman Ali
Summary: In this demonstrated design, a perfect solar absorber was built with multiple layers, achieving high absorption rates in different wavelength ranges. The addition of a graphene layer increased the absorption rate to 91%. The design operates in different spectral ranges and exhibits specific requirements for electric potential values and electric field progression.
Article
Multidisciplinary Sciences
Abdulkarem Almawgani, Bo Bo Han, Shobhit Patel, Ammar Armghan, Basim Ahmad Alabsi, Sofyan Taya
Summary: The manufacturing of solar absorbers is crucial in solar energy systems. A three-layer design consisting of titanium, stannic selenide, and ferric oxide is used to achieve high absorption rates. This structure exhibits high absorption rates in the wavelength range of 0.2-3 μm, with the best absorption rate observed between 0.2 and 1.5 μm.
ADVANCED THEORY AND SIMULATIONS
(2023)
Article
Thermodynamics
Sanket Patel, Shobhit K. Patel, Osamah Alsalman, Juveriya Parmar
Summary: The proposed solar thermal absorber is made of sandwich structure-inspired Ti-SiO2-Ti Metal-insulator-Metal material, presenting high absorption rate and nanoscale parameters. This solar absorber demonstrates excellent absorption performance across a wide range of wavelengths and features large angular and polarization-independent characteristics.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
