Browsing Physics, Engineering Physics and Astronomy, Department of by Title
Now showing items 189-208 of 287
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Phononic Crystal Waveguiding in GaAs
(2013-11-29)Compared to the much more common photonic crystals that are used to manipulate light, phononic crystals (PnCs) with inclusions in a lattice can be used to manipulate sound. While trying to propagate in a periodically ... -
Photoinduction of spontaneous surface relief gratings on Azo DR1 Glass
(Optics Letters 41, 2958-2961 (2016), 2016-06-23)Surface relief gratings were spontaneously photoinduced from a collimated Nd:YAG laser beam at 532 nm on thin films of a disperse red 1 functionalized glass-forming compound. Pattern formation was studied by measuring the ... -
Physical properties of a complete volume-limited sample of Ap/Bp stars: Magnetic. rotational, multiplicity, and evolutionary properties of magnetic intermediate-mass stars within 100 pc of the sun
(2007-09-27)The population of all magnetic chemically peculiar stars (Ap stars) within 100 parsecs of the sun has been identified and investigated, determining fundamental parameters, rotational properties, and magnetic field ... -
The PICO Dark Matter Search: Reflections and Projections
Dark matter remains one of the most intriguing mysteries of modern physics, and has sparked numerous experimental efforts to uncover its particle nature. Direct detection experiments using low threshold detectors in clean, ... -
The PICO-2L program: Towards Background-Free Dark Matter Direct Detection Using Bubble Chambers
The PICO-2L program commenced in 2013 with the deployment of a 2 litre bubble chamber filled with superheated C3F8 and over the next three years, conducted two separate WIMP-search experiments. The first run was conducted ... -
Polarimeter for an Accelerated Spheromak
(2014-05-01)A three-beam heterodyne polarimeter has been designed and constructed to measure line-integrated density and Faraday rotation of accelerated spheromak plasmas in the Plasma Injector 1 and 2 devices (PI-1, PI-2) at General ... -
Polymer Electrochemical Light-Emitting Devices and Photovoltaic Cells
(2009-12-14)Light-emitting electrochemical cells (LECs) are solid state polymer devices operating through the formation of a light-emitting p-n junction by in situ electrochemical doping. The LEC film contains a luminescent polymer ... -
Polymer Light-Emitting Electrochemical Cells with Embedded Bipolar Electrodes: Visualizing Bipolar Electrochemistry in Solid State
(2016-10-17)The work presented in this thesis examines the properties of BPEs of various configurations and under different operating conditions in a large planar LEC system. Detailed analysis of time-lapsed fluorescence images allows ... -
Polymer light-emitting electrochemical cells—Recent advances and future trends
(Elsevier BV, 2018-01-01)Polymer light-emitting electrochemical cells (PLECs) are electroluminescent devices whose operation involves both ionic and electronic charges. A key reaction in PLEC is the electrochemical doping of the light emitter, a ... -
Probing Molecular Dynamics with Non-Linear Optical Techniques
(2011-09-01)The dynamics of molecules in the gas and liquid phase is investigated using ultrafast optical techniques. The development of sub-25 fs ultrafast sources using noncollinear optical parametric amplification is discussed. ... -
Process Monitoring and Defect Detection of Additive Manufacturing Using Inline Coherent Imaging
(2016-10-05)With applications ranging from aerospace to biomedicine, additive manufacturing (AM) has been revolutionizing the manufacturing industry. The ability of additive techniques, such as selective laser melting (SLM), to create ... -
Progress Towards the Quantum Limit: High and Low Frequency Measurements of Nanoscale Structures
(2010-03-02)In this thesis, I present the work performed towards a proposal to couple a piezoelectric, nanomechanical beam to a radio frequency single electron transistor (RF-SET). Lumped element RF circuit theory is applied to 50 ... -
Promoting equity in introductory physics: An identity perspective on learning physics and learning to teach
(2013-08-23)If the goal of teaching introductory physics is to help every student have successful learning experiences, then we need to answer at least two key questions to achieve this goal. First, what instructional strategies will ... -
Pulse fitting for event localization in high purity germanium point contact detectors
P-type Point Contact (PPC) detectors are used in rare-event searches, such as neutrinoless double-beta decay and dark matter searches, due to their low radioactive backgrounds and low energy thresholds. The Majorana ... -
Pulse shape discrimination studies in liquid argon for the DEAP-1 detector
(2008-04-25)A detector with a target mass of 7 kg of liquid argon was designed, constructed and operated at Queen’s University. This detector is a scaled model for the DEAP project toward a tonne-scale argon detector to search for the ... -
Pulsed Eddy Current Inspection of Broach Support Plates in Steam Generators
(2015-10-06)Steam Generators (SGs) are a critical component of nuclear reactors, employing thousands of SG tubes to convert heat generated in the reactor core into useable energy. SG tubes are supported at numerous locations by Broach ... -
Purification of liquid scintillator and Monte Carlo simulations of relevant internal backgrounds in SNO+
(2008-02-05)The SNO+ experiment has begun research and development to engineer replacing the heavy water in the Sudbury Neutrino Observatory with liquid scintillator in order to study low energy solar neutrinos, double beta decay, and ... -
Quality Assurance Testing, and Sensitivity Studies for the SNO+ Experment
For the SNO+ experiment's search for neutrinoless double beta decay, radioactive background reduction and understanding of detector systematics are key. Indirect background measurements and energy systematics have been ... -
Quantitative Characterization of Nanovoids in Quenched Aluminum Using Small Angle X-ray Scattering Studies
(2011-10-14)A small angle X-ray scattering (SAXS) study of quenched-in nanovoids in 99.988 and 99.995 at.% aluminum (Al) is presented. Nanovoids are agglomerations of point defects (vacancies) in the metallic host. SAXS is a ... -
Quantum Nonlinear Optics in Lossy Coupled-Cavities in Photonic Crystal Slabs
(2015-06-02)A general formalism is developed that can be used to obtain photon dynamics in coupled-cavity system in leaky photonic crystal slabs. This is accomplished using a non-Hermitian projection operator, where the coupled-cavity ...