A5085897014- Quantum Information and Cryptography
- Experimental and Theoretical Physics Studies
- Quantum Mechanics and Applications
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Quantum optics and atomic interactions
- Advanced NMR Techniques and Applications
- Multiferroics and related materials
- ZnO doping and properties
- Atomic and Subatomic Physics Research
- Topological Materials and Phenomena
- Magnetic Properties and Synthesis of Ferrites
- Magnetic properties of thin films
- Magneto-Optical Properties and Applications
- Photonic and Optical Devices
- NMR spectroscopy and applications
- Ferroelectric and Piezoelectric Materials
- Quantum Computing Algorithms and Architecture
- Experimental Learning in Engineering
- Graphene research and applications
- Metamaterials and Metasurfaces Applications
- Advanced MRI Techniques and Applications
- Advanced Antenna and Metasurface Technologies
- Crystallography and molecular interactions
- Quantum and electron transport phenomena
Lahore University of Management Sciences
2015-2024
Monmouth Medical Center
2024
National Research University Higher School of Economics
2023
Sebelas Maret University
2018-2022
University of Cambridge
2022
Sir Syed University of Engineering and Technology
2018-2019
Cairo University
2019
Quantum Technologies (Sweden)
2019
Ain Shams University
2019
Rajshahi University of Engineering and Technology
2014
Efficient transmission-type meta-holograms have been demonstrated using high-index dielectric nanostructures based on Huygens' principle. It is crucial that the geometry size of building blocks be judiciously optimized individually for spectral overlap electric and magnetic dipoles. In contrast, reflection-type metal/insulator/metal scheme geometric phase can readily achieved with high efficiency small thickness. Here, we demonstrate a general platform design dual resonance silicon are...
Abstract Helicity-multiplexed metasurfaces based on symmetric spin–orbit interactions (SOIs) have practical limits because they cannot provide central-symmetric holographic imaging. Asymmetric SOIs can effectively address such limitations, with several exciting applications in various fields ranging from asymmetric data inscription communications to dual side displays smart mobile devices. Low-loss dielectric materials an excellent platform for realizing exotic phenomena efficiently. In this...
1. The influence of reproductive effort on host susceptibility to parasitism was examined in great tits, Parus major, by comparing the prevalence haematozoan parasites with respect clutch size male and female parents. 2. Observational experimental studies were conducted. documented relationship between parasite males females unmanipulated nests. Reproductive manipulated exchanging complete clutches pairs nests during incubation. Parents experienced a maximum manipulation ± 5 eggs. 3. showed...
Catalysis is vital to industrial chemistry, and the optimization of catalytic reactors attracts considerable resources. It has proven challenging correlate active regions in heterogeneous catalyst beds with morphology monitor multistep reactions within bed. We demonstrate techniques, using magnetic resonance imaging para-hydrogen (p-H2) polarization, that allow direct visualization gas-phase flow density a packed-bed microreactor, as well control over dynamics polarized state space time...
Multimodality imaging based on complementary detection principles has broad clinical applications and promises to improve the accuracy of medical diagnosis. This means that a tracer particle advantageously incorporates multiple functionalities into single delivery vehicle. In present work, we explore unique combination MRI photoacoustic tomography (PAT) detect picomolar concentrations nanoparticles. The nanoconstruct consists ferromagnetic (Co) particles coated with gold (Au) for...
We demonstrate the creation and observation of para-hydrogen-induced polarization in heterogeneous hydrogenation reactions. Wilkinson's catalyst, RhCl(PPh3)3, supported on either modified silica gel or a polymer, is shown to hydrogenate styrene into ethylbenzene produce enhanced spin polarizations, observed through NMR, when reaction was performed with H2 gas enriched para isomer. Furthermore, gaseous phase para-hydrogenation propylene propane two catalysts, catalyst Rh(cod)(sulfos) (cod =...
This work presents multifunctional metasurfaces for generating focused optical vortices of visible light.
We demonstrate transmission-based all-dielectric, highly efficient (≈73.4%) and polarization-insensitive meta-axicons (for the visible wavelength of 633 nm) to generate zero higher order Bessel beams without using additional components. The beams, owing their diverse applications non-diffractive properties, attract great interest from scientific community. It is shown that propagation length can be increased through a lower numerical aperture (∼2600 λ for NA = 0.1) whereas full width at half...
We investigate the photonic spin Hall effect (PSHE) of light beams reflected from surfaces various two-dimensional crystalline structures while considering their associated time-reversal $\mathcal{T}$ and inversion $\mathcal{I}$ symmetries. Using modified Haldane model Hamiltonian with tunable parameters as a generic system, we explore longitudinal transverse separations beam in both topologically nontrivial trivial systems. The PSHE observed these materials is attributed to topology....
Gas-phase MRI phantom: Magnetic resonance imaging (MRI) in the gas phase was demonstrated using para-hydrogen-induced polarization. H2 enriched para (antiparallel) spin state and propylene were flowed over solid-supported Wilkinson's catalyst, product, propane gas, collected an NMR tube. Enhanced signal intensities observed images of phantoms placed inside tube (see picture).
This paper describes theory and experiments, taken from biophysics physiological measurements, to illustrate the technique of signal averaging. In process, students are introduced basic concepts processing, such as digital filtering, Fourier transformation, baseline correction, pink Gaussian noise, cross- autocorrelation functions. From these computations, estimate physically interesting parameters pulse rate blood flow velocity. They also learn about some pitfalls encountered in quantifying...
Here we demonstrate how parahydrogen can be used to prepare a two-spin system in an almost pure state which is suitable for implementing nuclear magnetic resonance quantum computation. A 12 ns laser pulse initiate chemical reaction involving (the spin singlet of H2). The product, formed on the micros time scale, contains hydrogen-derived with effective spin-state purity 0.916. To achieve comparable result by direct cooling would require unmanageable (in liquid state) temperature 6.4 mK or...
Planar chiral structures respond differently for oppositely handed incident light, and thus can produce extraordinary chiroptical effects such as circular conversion dichroism (CCD) asymmetric transmission (AT). Such are powerful tools to realize the fundamental principle of optical spin isolation, which leads a plethora applications diodes, imaging, sensing. Here, we demonstrate simultaneous CCD AT through meticulously designed single-layered achiral nanofins. Our metamolecule consists four...
A thin film of dielectric material on metal provides a simple and cost-effective platform for absorbing light specific wavelength that can be desirably tuned by tailoring the thickness. This property controlled absorption lead to realizing various exciting applications such as absorbers color filters. The primary concern, however, in using multilayer configurations filtering is purity, which generally low compared patterned resonant structures employ costly nanofabrication techniques. We...
Here we demonstrate how sex allocation theory, one of the best verified areas metazoan evolutionary biology, can be successfully applied to microparasitic organisms, by relating parasite prevalence and ratio in Haemosporina. Members this taxon, which includes Plasmodium, are parasitic protozoa with obligate sexual cycles dioecious haploid gametes drawn from peripheral blood a vertebrate host fuse within dipteran vector. Consequently mating takes place highly subdivided population, condition...
Sufficient absorption to incident solar illumination, long exciton diffusion length, and efficient dissociation are extremely critical factors guarantee an acquirement of high power conversion efficiency (PCE) in cells, including perovskite cells (PSCs). In this work, Au@poly(4‐styrenesulfonate) (PSS) core–shell tetrahedra nanostructures, synthesized by seed mediated growth method, incorporated into PSCs for the first time improve light methylammonium lead iodide via surface plasmon...