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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Ali, Muhammad Mahmood
Atlantic Technological University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (21/21 displayed)
- 2024Optimizing Friction Stir Processing Parameters for Aluminium Alloy 2024 Reinforced with SiC Particles: A Taguchi Approach of Investigation
- 2024Mitigation of bio-corrosion characteristics of coronary artery stent by optimising fs-laser micromachining parameters
- 2024Mitigation of bio-corrosion characteristics of coronary artery stent by optimising fs-laser micromachining parameters
- 2023Lithium-based perovskites materials for photovoltaic solar cell and protective rays window applications: a first-principle calculations
- 2023Lithium-based perovskites materials for photovoltaic solar cell and protective rays window applications: a first-principle calculationscitations
- 2023Fabrication and characterizations of ultra-sensitive capacitive/resistive humidity sensor based on CNT-epoxy nanocompositescitations
- 2023Investigation of structural, electronic, mechanical, & optical characteristics of Ra based-cubic hydrides RbRaX3 (X= F and cl) perovskite materials for solar cell applicationscitations
- 2023A novel composite connecting rodcitations
- 2023A novel composite connecting rod: study on mechanical and dynamic behaviour through experimental and finite element approach
- 2023Investigation of structural, electronic, mechanical, & optical characteristics of Ra based-cubic hydrides RbRaX3 (X= F and cl) perovskite materials for solar cell applications: First principle study
- 2022On the application of Vickers micro hardness testing to isotactic polypropylenecitations
- 2022Effects of tin particles addition on structural and mechanical properties of eutectic Sn–58Bi solder jointcitations
- 2022Effect of laser processing parameters and carbon black on morphological and mechanical properties of welded polypropylenecitations
- 2021A comprehensive assessment of laser welding of biomedical devices and implant materialscitations
- 2021Laser transmission welding of semi-crystalline polymers and their compositescitations
- 2020Phase engineering with all-dielectric metasurfaces for focused-optical-vortex (fov) beams with high cross-polarization efficiencycitations
- 2020Spherical glass based fiber optic fabry-perot interferometric probe for refractive index sensing
- 2020Current research and development status of dissimilar materials laser welding of titanium and its alloyscitations
- 2015Wide-range in-fibre Fabry-Perot resonator for ultrasonic sensingcitations
- 2015Tilted Fiber Bragg Grating Sensors for Reinforcement Corrosion Measurement in Marine Concrete Structurecitations
- 2014Temperature gradient sensor based on CNT compositecitations
Places of action
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article
Phase engineering with all-dielectric metasurfaces for focused-optical-vortex (fov) beams with high cross-polarization efficiency
Abstract
<p>Metasurfaces, the two-dimensional (2D) metamaterials, facilitate the implementation of abrupt phase discontinuities using an array of ultrathin and subwavelength features. These metasurfaces are considered as one of the propitious candidates for realization and development of miniaturized, surface-confined, and flat optical devices. This is because of their unprecedented capabilities to engineer the wavefronts of electromagnetic waves in reflection or transmission mode. The transmission-type metasurfaces are indispensable as the majority of optical devices operate in transmission mode. Along with other innovative applications, previous research has shown that Optical-Vortex (OV) generators based on transmission-type plasmonic metasurfaces overcome the limitations imposed by conventional OV generators. However, significant ohmic losses and the strong dispersion hampered the performance and their integration with state-ofthe- art technologies. Therefore, a high contrast all-dielectric metasurface provides a compact and versatile platform to realize the OV generation. The design of this type of metasurfaces relies on the concept of Pancharatnam-Berry (PB) phase aiming to achieve a complete 2π phase control of a spin-inverted transmitted wave. Here, in this paper, we present an ultrathin, highly efficient, all-dielectric metasurface comprising nano-structured silicon on a quartz substrate. With the help of a parameter-sweep optimization, a nanoscale spatial resolution is achieved with a cross-polarized transmission efficiency as high as 95.6% at an operational wavelength of 1.55 μm. Significantly high cross-polarized transmission efficiency has been achieved due to the excitation of electric quadrupole resonances with a very high magnitude. The highly efficient control over the phase has enabled a riveting optical phenomenon. Specifically, the phase profiles of two distinct optical devices, a lens and Spiral-Phase-Plate (SPP), can be merged together, thus producing a highly Focused-Optical-Vortex (FOV) with a maximum focusing efficiency of 75.3%.</p>