Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 32 for “"Full width at Half Maximum (FWHM)"”.
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Machine learning-based non-destructive evaluation of fatigue damage in metals
Non-destructive evaluation (NDE) of fatigue damage in metals is crucial for ensuring high product performance and safety. In remanufacturing, NDE for the incoming recycled metal materials is also essential to maximize the benefits of utilizing such materials. However, critical challenges exist in …
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Study on the photoelectric hot electrons generation and transport with metallic-semiconductor photonic crystals
Photoelectric hot carrier generation in metal-semiconductor junctions allows for optical-to- electrical energy conversion at photon energies below the bandgap of the semiconductor. Which opens new opportunities in optical sensors and energy conversion devices. In this thesis research, the …
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Growth of Single Crystal, Metastable Ge(1-X)sn(x) Alloys and Ge(1-X)sn(x)/ge Strained-Layer Superlattices on Ge(001)2 X 1 by Molecular Beam Epitaxy
… $\rm Ge\sb{1-x}Sn\sb{x}$/Ge strained-layer superlattices (SLS) with x up to 0.24 (the equilibrium solid solubility of Sn in Ge is $<$0.01) were also grown on Ge(001)2x1 substrates using temperature-modulated molecular-beam epitaxy with maximum growth temperatures $\rm T\sb{s}\leq140\sp\circ$C. …
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Aluminum nitride microelectromechanical infrared detectors with integrated metamaterial absorbers
… (IR) detectors based on the seamless integration of metamaterial (MM) structures with microelectromechanical (MEMS) AlN resonators. Historically, uncooled absorbers have been limited in two key metrics: selectivity, the ability to distinguish distinct wavelengths of incident light, and …
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Time-dependent adjoint-based optimization of photonic crystals and metamaterials using a stabilized finite element method
… discrete adjoint algorithm for optimization of electromagnetic problems is developed. The proposed algorithm improves the efficiency for gradient-based optimization. The time-dependent Maxwell equations are discretized using a semi-discrete Petrov-Galerkin method, and time advancement …
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Extended-Range Oscillations and the First Sharp Diffraction Peak in Amorphous Silicon: A Systematic Study
… peak (FSDP), which characterizes the static structure factor of many glassy systems near the wave vector region of 1-2 Å<sup>-1</sup> has been observed depending on the temperature, pressure and the degree of annealing of the system. The presence of the FSDP is indicative of the …
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Numerical Study of Plasmon Resonances in Nanoparticles
… promising scientific and technological applications in such areas as nanophotonics, near-field microscopy, nano-lithography, biosensor, metamaterial and optical data storage. Consequently, the understanding of plasmon resonances in nanoparticles has both fundamental and practical significance. …
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Study of Charged Liquid Cluster Beam Generation and Application to Processing of Thin Films and Nanoparticles
… and nanoparticles. Silica nanospheres were fabricated using the CLCB technique. The median size of the resulting silica nanospheres was around 10 nm and the smallest size observed within the SEM resolution limit was 5 nm. Quantum wires of GaAs and silicon nanotips were fabricated by combining CLCB …
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Design of Optical Measurements for Electrothermal Plasma Discharges
Ablation controlled electrothermal (ET) plasma discharge devices consist of a small diameter capillary through which a large amount of energy is discharged. The high energy in the discharge ablates an inner sleeve material, ionizes the material, and a high energy-density plasma jet accelerates out …
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Aluminium nitride (AlN) as buffer layer for deposition of gallium nitride (GaN) thin films on silicon substrates using magnetron sputtering technique
… and power devices. The main issues that limit the performance of GaN-based ultraviolet light-emitting diodes (UV-LEDs) are difficult to achieve highly crystalline GaN because lack of suitable substrates available and needed for high-temperature deposition process. Hence, the present …
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Development of low coast atmospheric pressure plasma jet for nano and bio technology applications
The development of cold atmospheric plasma (CAP) can overcome many limitations of low pressure plasma. Low temperature plasma is widely used in the semiconductor and medical industry for cleaning purposes. However, the process is time consuming because low pressure plasma requires vacuum …
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Nano-optical studies of superconducting nanowire single-photon detectors
… visible to mid-infrared wavelengths. They have attracted particular attention due to their promising performance at telecommunications wavelengths. The additional benefits of superconducting nanowire single-photon detectors (SNSPDs) include low dark count rates (Hz) and low timing jitter (sub …
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Engineered quantum dots for infrared photodetectors
… Arrays (FPAs) have been proposed as an alternative technology for the 3rd generation FPAs. QDIPs are emerging as a competitive technology for infrared detection and imaging especially in the midwave infrared (MWIR) and longwave infrared (LWIR) regime. These detectors are based on intersubband …
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Design study of a two-panel head-and-neck cancer dedicated position emission tomography system
… (HNC) is collectively a group of cancers that usually begin in mucosal surfaces inside the head and neck. Due to the complex anatomy and vital physiological role of the tumor-involved regions, the goal of HNC treatment is not only to improve survival outcomes but also to preserve organ …
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A study of efficiency droop of green light emitting diodes grown by metalorganic chemical vapor deposition
… this thesis is to discuss the solutions investigated by AMDG (Advanced Materials and Devices Group) to reduce the "efficiency droop" effect that occurs in III-Nitrides Light Emitting Diodes (LEDs) when driven at high injection current densities. The efficiency droop refers to a decrease of the …
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Development of REBCO Tapes on Non-Metallic Flexible Substrates for RF Applications
… low-cost, and low-thermal-expansion substrate offer a unique advantage for radio-frequency (RF) applications such as surface receiver coils for magnetic resonance imaging (MRI). Second-generation high-temperature superconductors (2G-HTS) are well developed for direct current (DC) …
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Design and evaluation of a laser ion source for TITAN to measure 222Rn daughter product abundances
… and implementing a Laser Ion Source (LIS) at TRIUMF’s Ion Trap for Atomic and Nuclear Science (TITAN) facility to achieve high-precision isotope abundance ratio mea-surements across diverse materials. The project aims to quantify long-lived daughter products of 222Rn, including 210Pb, …
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Study of microstructure evolution in F/M steel T91 by in-situ synchrotron wide-angle X-rays scattering
… (F/M) steel is one of the leading candidates for high temperature structural materials in advanced nuclear power applications. In situ Wide-angle X-ray Scattering (WAXS) was used to investigate T91 during tensile test under 3 different temperatures: room temperature (RT), 450C, 550C, …
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Growth, Characterization and Measurement of Epitaxial Sr2RuO4 Thin Films
… their electrical transport properties are systematically discussed. The deposition and optimization process involved several progressive steps. Specifically, the first focus was on the Sr2RuO4 phase optimization in films grown on lattice-matched (LaAlO3)0.3(SrAl0.5Ta0.5O3)0.7 (LSAT) substrates. …
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System Design And Optimization Of Optical Coherence Tomography
… towards biomedical diagnosis, is the quantification of image quality and optimization of the system components, both a primary focus of this research. We concentrated our efforts on the optimization of the imaging system from two main standpoints: axial point spread function (PSF) and practical …
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