Browsing Physics and Astronomy by Title
Now showing items 437-456 of 768
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Opposing effects of cationic antimicrobial peptides and divalent cations on bacterial lipopolysaccharides
(American Physical Society, 2017-10-09)The permeability of the bacterial outer membrane, enclosing Gram-negative bacteria, depends on the interactions of the outer, lipopolysaccharide (LPS) layer, with surrounding ions and molecules. We present a coarse-grained ... -
Optical aberrations and cone photoreceptor sampling during normal emmetropization and emmetropization to imposed defocus
(University of Waterloo, 2018-04-23)The eye grows in a coordinated fashion during normal emmetropization which results in an image close to being in focus on the retina for distance vision. Myopia results from the failure of normal emmetropization. Myopia ... -
Optical Biosensing Using Localized Surface Plasmon Resonance of Gold Nanoparticles
(University of Waterloo, 2011-05-25)This thesis describes some experiments developed to probe the fundamental aspects of the interfacial behaviour of proteins. The contents of this thesis can be broadly divided into two parts. In the first part, we ... -
Optical Changes during Normal Emmetropization, Lens-induced Myopia and its Recovery in the Young Chick Eye
(University of Waterloo, 2015-01-20)In human eyes, the at-birth hyperopoic defocus gradually decreases to mild hyperopia or emmetropia at around age 6. Studies on refractive development suggest somewhat complex mechanisms at work between eye power and length. ... -
Optical Design for an Open Access Trapped Ion Quantum Processor
(University of Waterloo, 2021-08-31)The future of quantum information is scaling to a ever larger number of qubits. Doing so will require advances in the approach for all aspects of current experimental systems. The QuantumION project is a large step in this ... -
Optical Fiber Sensors for Temperature and Strain Measurement
(University of Waterloo, 2010-12-09)Optical fiber sensors have already been developed from the experimental stage to practical applications in the past 20 years. There is no doubt that this technology can bring a wealth of applications, ranging from sensors ... -
Optical pulse compression of first anti-Stokes order in the multi-frequency Raman generation with the presence of red shifted shoulder
(University of Waterloo, 2018-09-11)Multi-frequency Raman generation (MRG) is a nonlinear technique to generate intense trains of single-femtosecond pulses. The broad spectrum of different Raman orders which is spread from near-infrared (near-IR) to UV can ... -
Optical Pulse Shaping For Chirped Pulse Interferometry And Bio-Imaging
(University of Waterloo, 2011-09-02)Biomedical imaging requires high resolution to see the fine features of a sample and fast acquisition to observe live cells that move. Optical coherence tomography (OCT) is a powerful technique which uses optical ... -
Optical Quantum Communication & Cryptography with Temporarily Trusted Parties
(University of Waterloo, 2019-09-19)The work in this thesis can be divided into three parts. The first two parts deal with optical quantum communication protocols and the third part deals with quantum cryptography. The first part of the thesis is a step ... -
Optical Resonators Integrated into a Hollow Core Photonic Crystal Fiber for Enhanced Light-Matter Interactions
(University of Waterloo, 2019-08-29)The focus of this thesis is to investigate and fabricate a platform that can facilitate the enhancement of light-matter interactions. By tightly confining the photons and atoms to the same region of space, the probability ... -
Optics, Loss and Gravity
(University of Waterloo, 2021-01-13)We look at some ideas that can be found from making connections among optics, non-Hermitian dynamics and gravity. Using nonlinear optics, we demonstrate how loss can be used to make brighter sources of thermal light. Also, ... -
The optimization of a modern day record press
(University of Waterloo, 2022-01-13)The WarmTone is a fully automatic, modern-day vinyl record press manufactured by Viryl Technologies. The WarmTone has a wide array of sensors, parameters and settings that can be accessed via it's ADAPT Interface and the ... -
Optimization of an All Normal Dispersion Fiber Laser and a Gain Managed Nonlinear Amplifier
(University of Waterloo, 2023-07-17)Ultrafast laser systems are used in a wide variety of modern laser research. The combination of an all-normal dispersion fiber laser and a gain-managed nonlinear fiber amplifier makes for inexpensive and easy to build ... -
Optimization of MBE growth of a high-quality 2-Dimensional Electron Gas in InAs/AlGaSb material system for pursuing a top-down approach towards realization of topological qubits.
(University of Waterloo, 2020-09-04)Two-dimensional electron gas (2DEG) in InAs quantum wells grown on nearly lattice-matched GaSb substrates is an ideal platform towards the realization of topological quantum computing with Majorana fermions, due to its low ... -
Optimization of the Optical Infrastructure and Trapping Potential for a Quantum Processor Based on Trapped Barium Ions
(University of Waterloo, 2024-02-02)Trapped ion quantum computers represent a cutting-edge quantum computing platform, keeping the highest reported state preparation and measurement fidelity of 99.97%. Recently, barium ion has emerged as the research ... -
Optimizing Small-scale Redshift Space Distortion Measurements in eBOSS for Cosmological Inference
(University of Waterloo, 2023-09-21)Modern cosmological datasets have grown substantially in size and the precision of their measurements. While the improvement has had a beneficial impact on our understanding of the cosmological model, it requires equal ... -
Ordering and Reverse Ordering Mechanisms of Triblock Copolymers in the Presence of Solvent
(MDPI, 2009-02-27)Self-consistent field theory is used to study the self-assembly of a triblock copolymer melt. Two different external factors (temperature and solvent) are shown to affect the self-assembly. Either one or two-step self-assembly ... -
Ordering mechanisms in triblock copolymers
(American Physical Society, 2004)The ordering mechanisms for an ABC triblock copolymer system are studied using self-consistent field theory. We find a two-phase mechanism, similar to what has been suggested experimentally two-step mecha- nism. Analysis ... -
Orientation and Transitions of Lyotropic Lamellar Phase under Shear
(University of Waterloo, 2014-01-24)The intention of this study is to investigate the evolution and transition of lyotropic lamellar phase and the formation of multi-lamellar vesicles (MLVs) under shear flow, since the shear technology can be used to produce ... -
Origin of change in molecular-weight dependence for polymer surface tension
(APS publishing, 2008-09-30)Self-consistent-field theory is used to reproduce the behavior of polymer surface tension with molecular-weight for both lower and higher molecular-weight polymers. The change in behavior of the surface tension between ...