Mohammad Tariqul Islam

• Doctor of Philosophy
• Professor at National University of Malaysia

Graphene and zinc oxide (ZnO) nanowires (NWs)-based photodetectors demonstrate excellent photodetection performance in the ultraviolet (UV) spectrum regime. This paper presents the design and analysis of a heterostructure model of p⁺-few-layer graphene (p⁺-FLG)/n–-ZnO NWs-based UV photodetector. The design utilizes the unique properties of few-laye...

This research analyses contact pressure, sliding distance, and wear rate at the trunnion interface of hip implants during various activities to understand post-hip replacement outcomes. The study uses a numerical model and ISO-7206–6:2013 constraints with an AML hip implant. Greater Fx, Fy, and Fz forces broaden contact pressure distribution. The h...

This study presents a detailed comparative analysis of three electron transport layer (ETL) materials for perovskite solar cells (PSCs), namely titanium dioxide (TiO2), barium titanate (BaTiO3 or BTO), and strontium-doped barium titanate (Ba1−xSrxTiO3 or BST), and their impact on the quantum efficiency (QE) and power conversion efficiency (PCE) of...

This study offers a compact size, highly sensitive, and reliable split ring resonator-based sensor for microwave sensing applications. The designed unit cell is assembled on a 1.575 mm width of low-cost dielectric substrate Rogers RT5880. CST software is employed to design and analyze the proposed sensor. The size of the sensor is 8\documentclass[1...

The widespread issue of honey adulteration poses significant health risks and economic losses, necessitating more efficient and reliable detection methods. Traditional techniques are often time-consuming, expensive, and require sophisticated equipment. Moreover, the substrates traditionally used in metamaterial-based sensors present challenges such...

This paper presents a metamaterial-based liquid sensor to detect the quality of liquids. The sensor is compact, measuring 12.16 × 12.16 mm2 and operates X-band (8 to 12 GHz). The sensor performance has been evaluated using both theoretical and practical approaches. Experimental reflection coefficient values of − 42.99 dB, − 42.97 dB, and − 44.3 dB...

Cervical cancer belongs to the most dangerous types of cancers posing considerable threat to women’s survival. It is most often diagnosed in the advanced stages as precancerous lesions are often symptom-free and difficult to identify. Microwave imaging, especially in terahertz (THz) range, is a convenient and noninvasive cancer detection tool. It e...

This article presents a metamaterial absorber originated on a flexible substrate of MgxCa(0.90−x)Ni0.10Fe2O4. The MgxCa(0.90−x)Ni0.10Fe2O4 substrate is developed using the sol-gel technique, where X25, X50, and X75 represent 25%, 50%, and 75% of the corresponding material concentration, respectively. The dielectric constant values for X25, X50, and...

Modernizing power systems into smart grids has introduced numerous benefits, including enhanced efficiency, reliability, and integration of renewable energy sources. However, this advancement has also increased vulnerability to cyber threats, particularly False Data Injection Attacks (FDIAs). Traditional Intrusion Detection Systems (IDS) often fall...

Background Diabetes, affecting more than 500 million individuals worldwide, is the most widespread non-communicable disease, globally. The early identification and effective management of diabetes are crucial for controlling its spread. Currently, the HbA1c test is the gold standard for the detection of diabetes with high confidence. But this is an...

This research presents the design and analysis of a compact metamaterial (MTM)-based star-shaped split-ring resonator (SRR) enclosed in a square, constructed on a cost-effective substrate for liquid chemical sensing applications. The designed structure has dimensions of 10 × 10 mm² and is optimized for detecting adulteration in edible oils. When th...

Cancer and its diverse variations pose one of the most significant threats to human health and well-being. One of the most aggressive forms is blood cancer, originating from bone marrow cells and disrupting the production of normal blood cells. The incidence of blood cancer is steadily increasing, driven by both genetic and environmental factors. T...

This article presents a polarization-insensitive, negative indexed inverted U-shaped flexible metamaterial absorber based on a microstructure resonator for multi-band energy harvester application. The vertical inverted U-shaped joint and central split ring resonator together create significant resonance covering three consecutive L-, S-, and C-band...

This study presents the design and analysis of a Quad-band perfect metamaterial absorber (PMMA) with five distinct absorption peaks, achieving absorption rates consistently above 96%. The absorption performance is thoroughly examined by varying the structural parameters to elucidate the mechanisms underlying the multi-band absorption. Additionally,...

This article reports an Ultra wideband nano scale metamaterial absorber with ultrathin and flexible feature for visible spectrum applications. The absorber investigated for dispersion and Fano resonance characteristics to achieve metamaterial properties as well as independent of asymmetry of structure. Maximum visible spectrum wave interaction with...

A multipurpose antenna system that can handle a broad area of frequencies is crucial in the effort to build up widespread 5G Internet-of-Things (IoT) networks. For fifth-generation Internet-of-things applications, this research introduces a new multi-band antenna that can operate in the sub-6 GHz band (2–7 GHz), Ku-band (13–17.5 GHz), and millimete...

The field of intelligent transportation systems is rapidly evolving, with increasing focus on addressing traffic congestion, a pervasive problem in urban environments. This study contributes to this domain by enhancing traffic prediction models. Traditional traffic models often fall short in accurately predicting traffic flow, particularly in dynam...

This research focuses on designing a novel miniaturized biosensor for early-stage detection of leukemia. The proposed sensor operates in the low Petahertz (PHz) range. The primary prerequisites for the development process include multi-band operation, compact physical size, near-perfect absorption at resonant frequencies, and insensitivity to the a...

Metamaterials (MTMs) have emerged as essential components in high-performance electromagnetic devices, including sensors and absorbers. This study presents a polarization-insensitive nano-metamaterial sensor with exceptional angular stability and a wide operating range of 70 THz to 3 PHz. The sensor achieves an average absorption rate of 97% across...

This research introduces an innovative design for a metamaterial-based compact multi-band biosensor aimed at early-stage cervical cancer detection. The device operates within the terahertz (THz) frequency range, specifically from zero to six THz. The proposed sensor architecture features a metamaterial layer composed of a patterned aluminum structu...

The calculation of minimum determinant plays a crucial role in fulfilling the determinant criterion of a certain code design in space time trellis code. In the heuristic optimization of code construction, the minimum determinant is derived via a variant of the branch and bound algorithm. Although the algorithm is relatively efficient, it is not opt...

A new mirror-symmetric dodecagon resonator-based metamaterial (MM) has been proposed. It is intended for sensing applications. This MM is a candidate for further study because its transmission coefficient shows numerous resonances in the S and C bands. A low-loss Rogers RT5880 substrate is used to construct the resonating patch, which has an electr...

In the modern agricultural industry, technology plays a crucial role in the advancement of cultivation. To increase crop productivity, soil require some specific characteristics. For watermelon cultivation, soil needs to be sandy and of high temperature with proper irrigation. This research aims to design and implement an intelligent IoT-based soil...

This research focuses on the computational design, prototype development, and experimental validation of a compact microwave antenna for orthopaedic applications in biomedical regimes. The unique resonant structure comprises an embedded double negative (DNG) metamaterial (MTM)-inspired slotted stub, designed and simulated in the CST Microwave studi...

This research explores the design of an infrared (IR) photodetector using mercury cadmium telluride (Hg1–xCdxTe). It proposes two- and three-dimensional homojunction models based on p⁺-Hg0.7783Cd0.2217Te/n–-Hg0.7783Cd0.2217Te, focusing on applications in the long-wavelength infrared range. The photodetector’s performance is analyzed using Silvaco A...

This paper presents the detailed design configuration and investigation of a small-scale dual-band metamaterial absorber (MTMA) for solid and liquid sensing applications. The overall dimension of the MTMA unit cell is 10 × 10 × 1.57 mm³ and constitutes an affordable FR-4 substrate. The absorber exhibits dual absorption peaks at 3.470 GHz for the S-...

The microwave brain imaging (MBI) system is an emerging technology used to detect brain tumors in their early stages. Multi-class microwave-based brain tumor (MBT) identification and classification are crucial due to the tumor's patterns and shape. Manual identification and categorization of the tumors from the images by physicians is a challenging...

In this paper, we present an unprecedented metamaterial absorber design exhibiting exceptional characteristics in electromagnetic wave absorption. The proposed bent Y-shaped structure, fabricated on an FR-4 substrate with copper patches, showcases remarkable performance across a diverse frequency spectrum. Through exhaustive simulations in CST, thi...

This study analyzed stress distribution, stress shielding, and bone-implant micro-movement in different zones of implanted femur bone with hip implant stem composed of Inconel 718, 316 Stainless Steel, Ti6Al7Nb, Ti6Al4V, Ti-12Mo-6Zr-2Fe (TMZF), and Ti-33.6Nb-4Sn (TNS). A 3D model of a well-known hip implant “Summit” was placed in an adult femur bon...

This study presents a novel metamaterial (MTM) absorber-based microwave sensor designed for liquid oil detection, combining experimental validation and numerical simulations. The sensor leverages the Split Ring Resonator (SRR) technique and is simulated using Computer Simulation Technology (CST) based on the Finite Integration Technique (FIT) to an...

The search for highly efficient photodetectors, driven by various applications ranging from environmental monitoring to communication systems and imaging, continues to drive research into novel materials and innovative device architectures. This paper offers an in-depth comparative analysis to optimize the performance of two types of Schottky ultra...

This article proposes a polarization-insensitive compact Metamaterial (MM) energy harvester that can be used seamlessly in the S-band and C-band frequencies. It is important to focus on the limitations of many current designs of harvesters, which need to be overcome. The existing devices are large and often operate in a single frequency band, while...

This article proposes a dual-notch metamaterial-based complementary resonator that offers high sensitivity, high q-factor, simple design, and low fabrication cost for low-permittivity solid material sensing applications. The design comprises a maze-shaped complementary ring resonator (MCSRR) with multiple split rings, enhancing its inductance coupl...

This study presents a revolutionary tri-band combined microwave (MW) and millimeter wave (MMW) multiple-input-multiple-output (MIMO) antenna. The antenna is built on a Rogers RT-5880 substrate with dimensions of 32 × 32 × 1.6 mm. This integration increased the isolation from 18 dB to 27 dB in the MW band and 28 dB–40 dB in the MMW band. The effecti...

This work investigates the potential of BaTiO 3 (BTO) and Sr-doped BaTiO 3 (BST) as electron transport layers (ETL) in perovskite solar cells (PSCs) through Finite-Difference Time-Domain (FDTD) simulations. A comprehensive analysis was conducted to optimize the thickness of each layer in the PSC structure, with the aim of enhancing the photovoltaic...

This article proposes a thin and flexible stopband frequency selective surface (FSS) for 5G n257 band electromagnetic interference (EMI) shielding. The unit cell of the FSS consists of a fractal square ring resonator and an interconnecting fractal cross resonator. The size of the unit cell is only 1.9×1.9 mm <sup xmlns:mml="http://www.w3.org/1998/M...

A metamaterial-incorporated high-gain and broadband dipole antenna is proposed for 5G mm-wave applications. The designed high refractive index metamaterial (HRIM) properties are presented in detail with supporting results. The proposed dipole antenna achieved broadband features, and the antenna gain increased significantly by incorporating HRIM in...

We propose a theoretical design and analysis of a broadband metamaterial absorber (MMA) with significant potential for solar sailing applications which is a method of spacecraft propulsion that usages the momentum of sunlight to propel a spacecraft through space. The absorber features a metal-dielectric-metal configuration with a tungsten (W) based...

Nowadays, more cars are being added to the roads, which increases the risk of deadly accidents and the average commuter's daily travel time. To address these issues, vehicular ad hoc networks (VANETs) were developed, facilitating communication both among vehicles and between vehicles and infrastructure. Due to the great mobility of vehicles, the pr...

This study presents the design, fabrication, and measurement of a novel MIMO antenna for 28 GHz 5G applications. The design includes two compact antennas with dimensions of 12.8 × 12.8 × 1.6 mm³, placed side by side in a symmetrical arrangement. The antenna being considered operates within the 28 GHz frequency range and has excellent characteristic...

The paper outlines a methodology to diminish mutual coupling in 4-port dual-band MIMO textile antenna for biomedical applications. This antenna leverages MIMO technology and Wireless Body Area Network (WBAN) for operation in two distinct frequency bands at (3.5 & 2.45 GHz). The antenna is made up of four octagonal patch antennas, each having a bar...

The most popular technique for converting two-class images into binary images is thresholding. However, thresholding methods tend to perform poorly when dealing with images affected by uneven lighting. To address this issue, local thresholding techniques are commonly used. While pixel-based local thresholding methods can achieve high accuracy, they...

This paper presents a dual circular polarized C-band patch antenna for a small satellite communication system The antenna consists of two different annular patch structure with three split ring resonators. The antenna is designed considering space environment and the smallest form of satellite structure. The antenna is fabricated space qualified su...

This research focuses on advancing perovskite solar cell (PSC) technology through the use of a copper-doped Strontium Titanate (CSTO) as an electron transport layer (ETL), employing a hybrid simulation framework integrating SCAPS-1D and Ansys Lumerical FDTD. We systematically explore and compare the photovoltaic performance of PSCs with three disti...

The paper introduces a unique design and analysis of a terahertz metamaterial absorber (MMA) that can be used for early detection of cervical cancer by employing microwave imaging techniques. Computer Simulation Technology (CST) is used to design and analyze the proposed absorber. The MMA operates in the frequency range of 6–8 THz and can absorb en...

Epidermolysis bullosa acquisita (EBA) represents a big challenge as a rare skin disorder, with no established markers for early detection for patients. Moreover, as a rare disease, it is extremely difficult to acquire good number of patient sample to diagnose accurately with high confidence. EBA has many biomarkers very similar to other bullosa dis...

This research paper demonstrates a metamaterial (MTM) based sensing technique to detect various blood samples by analyzing their dielectric properties. The performance of this MTM-based sensor is evaluated with the help of mimicked human blood samples that closely resemble the dielectric properties of actual human blood samples. Moreover, the ISM b...

The concept, performance, and analyses of distinctive, miniaturized metamaterial (MTM) unit cell addressing the forthcoming Sub 6 GHz 5G applications are presented in this paper. Two circular split-ring resonators (CSRR) with two parallel rectangular copper elements in front of the design and a slotted square element in the background make up the s...

This research provides a detailed explanation of the design, simulation, and experimental of quad-square metamaterial-based negative-index unit cells for S-band applications. The Computer Simulation Technology 2022 licensee version was utilized to design and obtain numerical results for the unit cell. The proposed unit cell for the metamaterial has...

This paper represents a wide incident angle-polarization insensitive, stable in results, and compact-sized meta-material absorber that can be used for Doppler navigation aids and remote sensing applications in Earth Exploration Satellite Services. The unit cell dimension was subwavelength-sized of 0.112λ X 0.112λ, with a good effective medium ratio...

A Penta band negative permittivity metamaterial using a split disc ring resonator for satellite applications is investigated in this paper. The proposed structure features a double split ring resonator with a split disc resonator attached on top of a high frequency suitable dielectric substrate Rogers RO 4350B (lossy) with a flexible thickness of 0...

This work introduces a multiple input multiple output (MIMO) antenna for the fifth-generation mmWave applications. The single element of the proposed MIMO on Rogers RT5880 substrate resonates at 28GHz and works between 26.5 and 29.6GHz. Four antenna elements are then orthogonally positioned to form the MIMO antenna structure, which has a 27.70 × 27...

The pursuit of compact, high-speed, and broad-bandwidth systems has propelled communication technologies toward the fifth generation (5G). The need for extremely fast 5G speeds has led to the adoption of millimeter-wave frequencies. Technological advancements now allow the integration of mmwave into many contemporary electronic components, particul...

This paper presents a conductive component tailored to a flexible substrate using Al-doped CoxCa(0.90−x)Ni0.10Fe2O4 (x = 0.25, 0.50, and 0.75) for visible to near-infrared (NIR) spectra in magneto-optical applications. The developed nanoparticles show uniformity, nanosized grains, and capillary nanopore fusion characteristics, which are confirmed b...

Background The COVID-19 pandemic has affected people globally, causing widespread illness and functional limitations. Methods This cross-sectional study aimed to investigate the association between COVID-19 symptoms and the functional status of COVID-19 survivors at Bangabandhu Sheikh Mujib Medical University (BSMMU) in Bangladesh. A total of 244 C...

Metamaterials (MTMs) offer unique electromagnetic properties with wide-ranging applications in microwave sensing. This work introduces a unique approach for non-invasive pH level measurement in aqueous solutions and dielectric properties sensing in solid materials. Mu Negative (MNG) Metamaterial with transmission line and rejection band shifting te...

This paper presents a metamaterial structure, known as a triple decagon split-ring resonator, which operates in the Ku-band frequency. The proposed structure has two different ground planes, a full ground plane and a structured ground plane. The aim of having these two ground planes is to determine which one gives a better S21 performance. A simula...

This paper introduces a compact tuneable metamaterial (MTM) unit cell featuring a tri-hexagon and tri-square split ring resonator (THTSSSR) structure designed for 5G communication applications. Metamaterials are employed to achieve unique electromagnetic properties not found in natural materials. The design process involves the arrangement of three...