Quantum Interface Engineering with Solid-state spins and Photons
University of Oxford (2022 - Present) DPhil. Thesis
The aim of the project is to create novel spin-photon interfaces using quantum dots (QDs) and photonic cavities to enhance the quantum interaction using cavity quantum electrodynamics (cQED).
Surfactant-directed quantum-dot self-assembly for entangled photon sources using MBE & MOCVD
McMaster Univeristy (2019 - 2021) M.A.Sc. Thesis
The aim of the project is to grow quantum dots (QDs) and other nanostructures on unconventional (111) surfaces due to their exotic properties. One of the properties is the extreme symmetry exhibited by these surfaces and the nanostructures grown on them, making them ideal candidates for entangled photon sources and other novel devices. Surfactants, such as bismuth, are used to induce Stranski-Krastnov QD growth on GaAs(111) where it was previously prohibited. Detailed studies of surface properties and optimal MBE growth conditions for GaAs(111) are carried out as part of the study. The project is being done under the supervision of Prof. Ryan Lewis,
Tasks and Responsibilities:
Designing and carrying out growth schemes for quantum nanostructures (QW, QDs) on GaAs(111) using molecular beam epitaxy.
Characterizing growth using RHEED and designing experiments to investigate material properties.
Characterization using Atomic force microscopy, photoluminescence etc.
Analyzing experimental data and simulating/calculating the quantum and optical properties of the nanostructures.
Calibrating and maintaining aspects of the MBE system.
Preparing reports/publications.
Bi on GaAs(111)A
Observing RHEED reconstruction change while designing Bi desorption experiment on GaAs(111)A
MOCVD system at the Centre of Emerging Device Technologies (CEDT) at McMaster.
Hybrid Thermophotovoltaic system using a plasmonic absorber
The American University in Cairo (2018 - 2019)
In this project, a hybrid thermophotovoltaic system was designed consisting of a nanowire solar cell, with a plasmonic mid-IR absorber attached to a thermometric generator to harvest the thermal mid-IR emissions and convert the temperature difference to electricity. The project was done under the supervision of Prof. Mohamed Swillam.
Tasks and responsibilities:
Reviewing the relevant literature and theory pertaining to plasmonic and nanowire based solar cells from both a theoretical and fabrication standpoint.
Using Lumerical simulation tools for simulation and design of plasmonic solar cells in addition to replication of previous results in the literature.
Characterization and conducting various optical measurements and experiments on nanowires and other patterned materials.
Proposal of a novel thermo-photovoltaic hybrid system for energy harvesting (design & simulation).
Writing and preparing manuscripts and research papers.
Nanowire Solar cell unit cell
Total absorption of highly doped Si nanosphere exhibiting a plasmonic effect (Lumerical FDTD simulation)
Design, characterization, and modelling of a MEMS-based swept laser source
Ain Shams Univeristy (2017 - 2018) B.Sc. Thesis
In this work, I investigated the feasibility of using a MEMS based swept laser source for tunable laser spectroscopy applications, while also modelling, characterizing, and bolstering the performance of the swept source. For the cavity of the laser, an MEMS based fabry-perot intra-cavity filter was used. A full fourier optics model (angular spectrum method) was programmed in MATLAB to model the MEMS filter. A graded index (GRIN) lens was fabricated and attached to the fibers of the fiber ring laser to boost the performance. The project was done under the supervision of Prof. Yasser Sabry and Prof. Diaa Khalil.
Tasks and responsibilities:
Characterization (noise, spectrum etc.) of the swept laser source setup.
Improvement of the setup by design, fabrication, and employment of graded index lenses.
Creation of an accurate Gaussian beam model for the MEMS tunable Fabry Perot filter used in the setup.
Utilization of the swept source to measure different gas concentrations using tunable laser spectroscopy
MEMS swept laser source setup
Output of FP filter model transmission spectrum using different input Gaussian beam waists
Output laser spectrum at different voltages after improving the fiber-ring setup with lensed fibers.