A5100654356- Photonic Crystal and Fiber Optics
- Advanced Fiber Laser Technologies
- Photonic and Optical Devices
- Optical Network Technologies
- Advanced Fiber Optic Sensors
- Plant Micronutrient Interactions and Effects
- Plant nutrient uptake and metabolism
- Chalcogenide Semiconductor Thin Films
- Conducting polymers and applications
- Advanced Photonic Communication Systems
- Gas Sensing Nanomaterials and Sensors
- Quantum Dots Synthesis And Properties
- Advanced Optical Network Technologies
- Perovskite Materials and Applications
- Soil Carbon and Nitrogen Dynamics
- Phase-change materials and chalcogenides
- ZnO doping and properties
- Advanced Sensor and Energy Harvesting Materials
- 3D Printing in Biomedical Research
- Supercapacitor Materials and Fabrication
- Electrochemical sensors and biosensors
- Analytical Chemistry and Sensors
- Membrane Separation Technologies
- Membrane Separation and Gas Transport
- Phosphorus and nutrient management
King Saud University
2021-2025
Bangladesh Agricultural Research Institute
2024
Daffodil International University
2024
King Salman Center for Disability Research
2024
University of Alberta
2024
Independent University
2019-2023
Institute of Soil Science
2018-2021
Chinese Academy of Sciences
2018-2021
University of Chinese Academy of Sciences
2018-2020
University of Malaya
2015-2019
We numerically investigate mid-infrared supercontinuum (SC) generation in dispersion-engineered, air-clad, Ge 11.5 As 24 Se 64.5 chalcogenide-glass channel waveguides employing two different materials, S or MgF 2 glass for their lower cladding.We study the effect of waveguide parameters on bandwidth SC at output 1-cm-long waveguide.Our results show that can vary over a wide range depending its design and pump wavelength employed.At µm never extended beyond 4.5 any our designs.However, could...
Abstract The Schockley–Quisser (SQ) limit of 28.64% is distant from the Sb 2 S 3 solar cells’ record power conversion efficiency ( PCE ), which 8.00%. Such poor mostly owing to substantial interface-induced recombination losses caused by defects at interfaces and misaligned energy levels. endeavor this study investigate an efficient cell structure via accurate analytical modeling. proposed model considers different mechanisms such as non-radiative recombination, /CdS interface Auger, SRH,...
A promising design of Ge 11.5 As 24 Se 64.5 nanowires for supercontinuum generation is proposed through numerical simulations.It can be used generating a with 1300-nm bandwidth.The dispersion parameters upto eighth-order are obtained by calculating the effective mode index finite-element method.We have investigated curves number nanowire geometries.Through engineering and varying dimensions we identified structure that shows possibility realizing wideband supercontinuum.We found significant...
Expression levels of the NAC gene family were studied in rice infected with Rice dwarf virus (RDV), black-streaked (RBSDV), grassy stunt (RGSV), ragged (RRSV) and transitory yellowing (RTYV). Microarray analysis showed that 75 (68%) OsNAC genes differentially regulated during infection RDV, RBSDV, RGSV, RRSV compared control. The number upregulated was highest RGSV infection, while lowest found RTYV infection. These phenomena correlate severity syndromes induced by infections. Most subgroups...
In this study, reduced graphene oxide/cobalt oxide@nickel (rGO/Co3O4@Ni) nanocomposites were synthesized via a hydrothermal method at low temperatures and subsequently annealed 600 °C. The nanostructured rGO/Co3O4@Ni underwent comprehensive evaluation to assess their microstructural electrochemical properties. XRD analysis indicated the formation of Co3O4 cubic structure, characterized by space group Fd̅3m(227), with distinct peaks (220), (311), (222), (400), (422), (511), (440) planes....
We numerically study the dispersion-engineered chalcogenide photonic crystal fiber (PCF), which allows us to generate ultraflat broadband supercontinuum (SC) spectra in all-normal dispersion regime. A 1-cm-long hexagonal PCF made using Ge <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">11.5</sub> As xmlns:xlink="http://www.w3.org/1999/xlink">24</sub> Se xmlns:xlink="http://www.w3.org/1999/xlink">64.5</sub> glass pumped at 1.55 μm produced an SC...
We demonstrate numerically that the use of dispersion-engineered microstrucured fibers made with chalcogenide glasses allows one to generate ultrabroadband supercontinuum spectra in mid-infrared region by launching optical pulses at a suitable wavelength. As specific example, numerical simulations show such 1 cm long fiber, Ge11.5As24Se64.5 glass and pumped wavelength 3.1 μm using short relatively modest peak power 3 kW, can produce spectrum extending from 1.3 beyond 11 (more than octaves)....
Abstract Background Phosphate (Pi) deficiency severely affects crop growth and productivity, including wheat, therefore it is necessary to develop cultivars with enhanced Pi-deficiency tolerance. However, the underlying mechanism of tolerance in wheat still elusive. Two contrasting cultivars, low-Pi tolerant Kenong199 (KN199) sensitive Chinese Spring (CS) were used reveal adaptations response Pi at morphological, physiological, metabolic, molecular levels. Results KN199 was more than CS...
We show numerically, how a chalcogenide planar waveguide designed to exhibit normal dispersion over wide spectral range around the pump wavelength can produce relatively flat supercontinuum in mid-infrared regime. A 1-cm-long channel waveguide, made using Ge <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">11.5</sub> As xmlns:xlink="http://www.w3.org/1999/xlink">24</sub> Se xmlns:xlink="http://www.w3.org/1999/xlink">64.5</sub> glass and pumped at...
In recent years, low cost and scalable integrated optics compatible planar waveguides have emerged for an ultrabroadband supercontinuum generation between ultraviolet mid-infrared region applications. A 20-mm-long photonics highly nonlinear As2Se3 channel waveguide, which exhibited wider as well lower magnitude nearly flat anomalous dispersion region, designed modeled by employing GeAsSe glass its upper claddings. Using pump source at 6 μm with a pulse duration of 170-fs, long wavelength...
An ultrabroadband mid-infrared supercontinuum (SC) source has been designed and modeled using a 10-mm-long all-chalcogenide triangular-core fiber (TCF). The TCF structure can be fabricated from Ge11.5As24Se64.5 chalcogenide glass as core Ge11.5As24S64.5 for its cladding running along the length of instead air holes. Assuming pump operates at 4 μm, is optimized by varying side both anomalous-dispersion all-normal-dispersion SC generation. Mid-infrared-region spectral broadening spanning...
We numerically demonstrate the generation of a mid-infrared supercontinuum (SC) through design an on-chip complementary metal oxide semiconductor (CMOS) compatible 10-mm-long air-clad rectangular waveguide made using stoichiometric silicon nitride (Si 3 N 4 ) as core and MgF 2 glass its lower cladding.The proposed is optimized for pumping in both anomalous all-normal dispersion regimes.A number geometries are at 1.55 µm with ultrashort pulses 50-fs duration peak power 5 kW.By initially...
A promising 2-mm-long highly coherent air-clad suspended core planar Si-rich SiN tapered waveguide is proposed for supercontinuum generation in the midinfrared. Supercontinuum evolution investigated by tuning both of transverse-electric (TE) and transverse-magnetic (TM) polarizations employing pump at 1.55 m with a pulse duration 50-fs peak power 50 W. Optimum dimensional parameters including width thickness are obtained between 1.5-3 <inline-formula...
Field experiments were conducted in 2006 and 2007 under subtropical conditions to investigate the variations growth reproductive characters, yield attributes for selection of important source sinks characters using correlation path coefficient analyses 45 mungbean genotypes. Large genetic variability existed viz., leaf area index (LAI) (1.22 3.80) sink number racemes plant -1 (6.30 22.9), flowers (18.1 51.9) pods (9.6 22.1). Genotypic study revealed that among traits investigated, LAI was...