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Full-Text Articles in Engineering

Plasmonic Devices Based On Transparent Conducting Oxides For Near Infrared Applications, Kim Jongbum Dec 2016

Plasmonic Devices Based On Transparent Conducting Oxides For Near Infrared Applications, Kim Jongbum

Open Access Dissertations

In the past decade, there have been many breakthroughs in the field of plasmonics and nanophotonics that have enabled optical devices with unprecedented functionalities. Even though remarkable demonstration of at photonic devices has been reported, constituent materials are limited to the noble metals such as gold (Au) and silver (Ag) due to their abundance of free electrons which enable the support of plasmon resonances in the visible range. With the strong demand for extension of the optical range of plasmonic applications, it is now a necessity to explore and develop alternative materials which can overcome intrinsic issues of noble metals ...


Dynamic Holography In Semiconductors And Biomedical Optics, Hao Sun Dec 2016

Dynamic Holography In Semiconductors And Biomedical Optics, Hao Sun

Open Access Dissertations

Three-dimensional scanning and display are rapidly-advancing new technologies with important commercial drivers such as 3D printing and remote imaging for big data applications. Holography is a natural approach to recording and displaying three-dimensional information because it uses phase-sensitive interferometry to record interference patterns when a reference beam encounters coherent light arriving from an object. The 3D information is contained in the values of wave optics. Holography is a broad field that goes beyond recording and displaying. For instance, holographic optical elements, which take advantage of holographic imaging principles, perform the functions of lenses, gratings or mirrors. Holographic interferometry is also ...


Enhanced Mechanical Performance Of Low Dielectric Constant Thin Films Synthesized In Supercritical Co2, And Sans Studies Of Microemulsions Induced Or Destabilized By Compressed Co2, Alvin Horatio Romang May 2012

Enhanced Mechanical Performance Of Low Dielectric Constant Thin Films Synthesized In Supercritical Co2, And Sans Studies Of Microemulsions Induced Or Destabilized By Compressed Co2, Alvin Horatio Romang

Open Access Dissertations

Block copolymer (BCP) phase segregation and self-assembly into two or more distinct domains are primarily dictated by two parameters: the block volume fraction, f, and the product of the segment-segment interaction parameter and the length of polymer chain, XN. The volume fraction determines a block copolymer's phase segregated morphology, whereas XN dictates its overall segregation strength, or phase stability. In order to achieve smaller domain sizes, the interaction parameter must be increased to compensate for the decrease in chain length. In the melt, PEO-b-PPO-b-PEO (Pluronic) triblock copolymer surfactants do not phase segregate primarily due to their low molecular weights ...


Band Structure Calculations Of Strained Semiconductors Using Empirical Pseudopotential Theory, Jiseok Kim Feb 2011

Band Structure Calculations Of Strained Semiconductors Using Empirical Pseudopotential Theory, Jiseok Kim

Open Access Dissertations

Electronic band structure of various crystal orientations of relaxed and strained bulk, 1D and 2D confined semiconductors are investigated using nonlocal empirical pseudopotential method with spin-orbit interaction. For the bulk semiconductors, local and nonlocal pseudopotential parameters are obtained by fitting transport-relevant quantities, such as band gap, effective masses and deformation potentials, to available experimental data. A cubic-spline interpolation is used to extend local form factors to arbitrary q and the resulting transferable local pseudopotential V(q) with correct work function is used to investigate the 1D and 2D confined systems with supercell method. Quantum confinement, uniaxial and biaxial strain and ...