A5032608030- ZnO doping and properties
- Antenna Design and Analysis
- Transition Metal Oxide Nanomaterials
- Thin-Film Transistor Technologies
- Wireless Body Area Networks
- Microwave Engineering and Waveguides
- Semiconductor materials and devices
- Gas Sensing Nanomaterials and Sensors
- Microwave Imaging and Scattering Analysis
- Chaos-based Image/Signal Encryption
- Energy Harvesting in Wireless Networks
- Metal and Thin Film Mechanics
- Laser Material Processing Techniques
- High-Temperature Coating Behaviors
- Welding Techniques and Residual Stresses
- Advanced Steganography and Watermarking Techniques
- GaN-based semiconductor devices and materials
- Plasmonic and Surface Plasmon Research
- Semiconductor Lasers and Optical Devices
- Photonic and Optical Devices
- Advanced Fiber Optic Sensors
- Advanced Welding Techniques Analysis
- Explainable Artificial Intelligence (XAI)
- Healthcare and Environmental Waste Management
- Multilevel Inverters and Converters
Alliance University
2021-2025
University Alliance
2022
University of Toledo
2015-2022
Vellore Institute of Technology University
2012-2021
South Dakota School of Mines and Technology
2006
A reconfigurable surface-plasmon-based filter/sensor using D-shaped photonic crystal fiber is proposed. Initially a PCF designed and optimized to realize the highly birefringence by ensuring single polarization filter. tiny layer of silver placed on flat surface with small half-circular opening activate plasmon modes. By effect maximum confinement loss about 713 dB/cm realized at operating wavelength 1.98 µm in X-polarized mode. At this proposed only allows Y-polarization filters...
This work reports on the effect of ultraviolet (UV) laser irradiation structural, electrical, and optical properties nickel oxide (NiOx) thin films, deposited by reactive sputtering in an oxygen containing atmosphere. It was found that conduction type can be changed from p-type to n-type resistivity decreased as number pulses is increased then increases again. The as-deposited films are polycrystalline, while renders amorphous. observed transition O-rich NiOx Ni-rich laser-irradiated...
This paper presents a computational study of non-stoichiometric nickel oxide in 64-cell NiO system to model and validate localized heating effects due nanosecond laser irradiation. Variation the Bandgap is studied as function varying concentrations native defects, ranging from 0 25%. It observed that there slight increase bandgap 3.80 eV for stoichiometric 3.86 Ni-rich 3.95 O-rich NiO. hence deduced experimental irradiation leads simultaneous reduction Ni2+ ions oxidation number pulses...
We utilized laser irradiation as a potential technique in tuning the electrical performance of NiOx/SiO2 thin film transistors (TFTs). By optimizing fluence and number pulses, TFT was evaluated terms mobility, threshold voltage, on/off current ratio subthreshold swing, all which were derived from transfer output characteristics. The 500 pulses-irradiated exhibited an enhanced mobility 3 cm2/V-s value 1.25 for as-deposited TFT, swing 0.65 V/decade, 6.5 × 104 voltage −12.2 V. concentration...
In this study, the development of diverse antenna designs using additive manufacturing processes, specifically spanning from L-band to K-band is proposed. All are implemented on a flexible FR4 substrate make them suitable for wearable sensors and biomedical applications. The fabrication process involves utilization aerosol jet printing with nanoparticle silver ink, followed by curing in vacuum chamber. Additionally, screen copper paste employed as another method, subsequent laminator....
In this work, we examine the potential improvement in inductance (L) and quality factor (Q) of on-chip ferromagnetic thin film inductors through formation conical microstructures by localized ultraviolet laser irradiation on film. Parameters affecting L Q, arising from surface modification upon include thickness film, size, density structures. The is optimized to 0.2 μm, at least 18% increase 25% Q-factor for NiFe comparison conventional spiral inductor expected. Q values films with without...
Terahertz (THz) technology has emerged as a promising field for various applications, including imaging, spectroscopy, and wireless communication. However, designing fabricating terahertz antennas presents several challenges, such material selection, fabrication precision, integration with other components. This paper the design, fabrication, characterization of compact microstrip antenna dimensions 3mm x 2mm, leveraging Aerosol Jet Printing (AJP) technology, which enables direct printing...
The potential of NiO sublayers for whisker growth mitigation has been examined. A thin film was applied on a Cu-coated substrate before the deposition thicker Sn layer. whiskers then followed by optical and scanning electron microscopy compared with control sample without sublayer. No were observed layer even after 12 months, whereas developed size density that is generally expected, based vast amount published work topic. mechanisms suppression are briefly discussed as well.
This work reports on the fabrication of microbump structures nickel (Ni) films by single-pulse, localized laser irradiation. Conditions for reproducible formation such microstructures have been identified in terms laser-irradiation and film parameters after systematic studies involving a relevant parameter space. Ni deposited vacuum evaporation were found to be better suited microstructuring because they lack typical cracks voids morphology sputtered films. The continuous smooth nature...
Friction Stir Spot Welding (FSSW) has a strong potential to find applications in both the automotive and aerospace industries. At present time, research efforts are taking place gain better understanding of process, explore different tool configurations, optimize set process parameters. In this regard, gaining an how material flows under given processing parameters is particular importance for design validate numerical models aimed at simulating process. paper, results corresponding...
In this work, we propose a wideband multi-section transforming coupled-line balun using near equal length transmission line elements. The resulting design is realized by cascading several coupled-lines with minimal discontinuities. Chebyshev matching optimizes bandwidth at the expense of passband ripple. proposed delivers good impedance and consistent 180° phase shift over 0.8–8 GHz frequency spectrum. Furthermore, need for vias in conventional designs relaxed replacing short-circuited (SC)...
Microwave imaging utilizes low-power near-field electromagnetic fields at microwave frequencies to detect the internal structure of an object. Sufficient resolution through thickness is crucial in biomedical applications small objects concern. Parameters such as frequency signals, design, and material antenna are most important factors consider for microwave-based sensing. The proposed yields merits of: compactness size, ease fabrication, wider impedance bandwidth, simple good RF...