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 80 for “"Optical characterization"”.
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Optical characterization of ZnSe by photoluminescence
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.
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Optical characterization of processed gallium arsenide
Raman scattering and ultraviolet-visible reflectivity have been used to characterize the structural and electronic changes that occur in GaAs during ion implantation and subsequent annealing. In this work, the damaged structure is modelled as an amorphous GaAs matrix embedded with GaAs …
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Three-Dimensional Optical Characterization of Heterogeneous Polymer Systems
… systems, determination of the three dimensional optical properties are particularly difficult. Such information is essential, however, if the behavior of these systems are to be understood and formalized. The purpose of the present research was to develop methods for measuring the optical …
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Electrical and optical characterization of colloidal silicon nanocrystals
… thesis focuses on studying the electrical and optical properties of SiNCs. The electrical conductivity and mobility of electrons and holes are successfully extracted in order to explain the observed dependence of device efficiency on SiNC surface ligand coverage. Steady-state and transient …
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Optical characterization of thermal transport in multifunctional materials
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-04-06 without embargo terms
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Optical Characterization and Evaluation of Dye-Nanoparticle Interactions
… interested researchers because of their unique optical properties. Depending on the metal, observations of quenching as well as fluorescence enhancement have been reported. Based on the phenomenon of surface plasmon resonance as well as the properties of metallic nanoparticles, this research …
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Optical characterization of compound semiconductors using photoconductivity and photoreflectance
Custom photoreflectance modulation spectroscopy and photoconductivity spectroscopy set-ups were constructed and used to characterize semiconductor materials. The ternary Cd1--xZnxTe compound was studied to achieve fine control over its composition to provide lattice-matched substrates for the …
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Optical Characterization of Electrochemically Self-Assembled Compound Semiconductor Nanowires
… attention as possible source for lasers and optical storage media. We report the fabrication and optical characterization of ZnO and CdS nanowires. The former are produced by electrochemical deposition of Zn inside nanoporous alumina films containing regimented arrays of 10nm, 25nm and 50 nm …
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Synthesis and Optical Characterization of Boron based Nanostructured Materials
… to defect formation, which greatly affects their optical properties. Due to these unique properties of Boron, this thesis focuses on the synthesis of low-dimensional boron nanomaterials with a special focus on understanding of origin of photoluminescence and the impact of structural defects on …
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Optical Characterization of Defects and Impurities in Gallium Nitride
Photoluminescence was used to measure the bandgap of GaN as a function of temperature in the range 2--811 K, and the results were fitted to Varshni's empirical formula to obtain an expression for the dependence of the energy gap of GaN on temperature which should be generally applicable to most …
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Optical characterization of copper indium gallium diselenide thin films
… performance in devices, low degradation, high optical absorption coefficient and high tolerance to off-stoichiometry and intrinsic defects. Film conductivity and recombination losses are controlled by intrinsic point defect concentrations, especially in the near-surface space-charge region of …
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Optical characterization of human tissues using low coherence interferometry
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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Optical characterization of complex mechanical and thermal transport properties
… supercooled liquids. In ISS measurements, short optical pulses are crossed to produce a periodic excitation profile in or at the surface of the sample. Light from a probe beam that diffracts off the periodic material response is monitored to observe the dynamics of interest. A number of …
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Disordered quantum well waveguide fabrication and ultrafast optical characterization
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1990.
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Colloidal CdSe/CdS nanostructures : synthesis, optical characterization and applications
… semiconductors, as well as for enabling various optical and optoelectronic applications. In this thesis, we will discuss our recent efforts to improve the synthesis of CdSe/CdS structures, to better understand their optical properties and to use them to create highly performing luminescent solar …
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Optical Characterization of CdTe, CdMgTe, and CdTe/CdMgTe Double Heterostructures
No abstract prepared.
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OPTICAL CHARACTERIZATION OF WIDE ENERGY AGP GROUP III-NITRIDE SEMICONDUCTORS
This thesis documents the findings of the optical characterization of wide-band gap group III nitrides. Several optical spectroscopic techniques were applied to GaN and related materials grown by metalorganic chemical vapor deposition (MOCVD). Variable-temperature photoluminescence (PL) spectra …
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Optical characterization of emulsions and applications in the dairy industry
Milk and milk products are an integral part of diet for a major segment of human population. Safety and quality of the industry's products is therefore essential as it directly affects human health and wellbeing. The present thesis discusses work towards developing analytical technologies and …
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Micromagnetic modelling and magneto-optical characterization of Ni/V2O3 hybrid structures
Magnetic behaviour of five bi-layer V2O3/Ni thin film samples sputtered on sapphire, Al2O3, were investigated using MOKE (magneto-optic Kerr effect). Three samples show a fourfold symmetry in coercivity with very small but similar change in magnetic remanence. For comparison micromagnetic …
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