Browsing OU - Dissertations by Author "Santos, Michael"
Now showing items 1-20 of 21
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CHARACTERIZATION AND DEVELOPMENT OF SEMICONDUCTOR CASCADE DEVICES
Rassel, SM Shazzad (2018-05-11)Interband cascade lasers (ICLs) are efficient source of mid-infrared light for many applications that require low power consumption and continuous wave (cw) operation at room temperature. In the last decade, remarkable ... -
GROWTH OF WIDE BANDGAP SEMICONDUCTORS USING PULSED ELECTRON BEAM DEPOSITION (PED) PROCESS
Arefin, Nazmul (2015)Wide bandgap materials hold a great potential in solid state lighting, power electronics, and radio frequency (RF) device applications. The cumulative market for all these applications is forecasted to be approximately $75 ... -
High-performance InAs-based interband cascade lasers
Jiang, Yuchao (2016-05)Currently, there are only two types of mid-infrared lasers that are capable of continuous-wave (CW) operation above room temperature: quantum cascade (QC) lasers and interband cascade (IC) lasers. Both of them share the ... -
High-precision measurements of alkanethiol self-assembled monolayer structure with scanning tunneling microscopy
Yothers, Mitchell (2020)This thesis describes a measurement methodology and set of tools for measuring scanning tunneling microscope images of crystals at picometer length scales. We use the crystal structure present in high-quality scanning ... -
III-V and Thin Film Photovoltaics for Extraterrestrial Application
Brown, Collin Richard (2019)Photovoltaic power is one of the few options available for electrical devices stationed outside of our atmosphere. As the satellite market turns to smaller satellites based on the CubeSat and SmallSat form factor, these ... -
Interaction effects in generalized Dirac systems
Dou, Xu (2018-07)Interaction effects in condensed matter systems with chiral quasiparticles at low energy are studied. A prominent example in the category of such systems is monolayer graphene, which has low energy massless Dirac excitations ... -
Interaction Effects in Quantum Wires and One-Dimensional Incoherent Semimetals
Jose, Geo (2022-08-04)In this thesis, we address the effect of interactions in low dimensional systems. In the first part, using bosonization, we study a microscopic model of parallel quantum wires constructed from two dimensional Dirac fermions ... -
Intervalley Scattering in III-V Heterostructures and its Application to Valley Photovoltaic Hot Carrier Solar Cells
Dorman, Kyle (2022-12-16)The efficiency limit of 33% for a single gap solar cell is not fundamental. Mitigation of thermalization losses which occur when high energy ‘hot’ carriers are only extracted at the same energy as low energy carriers is a ... -
IV-VI MATERIALS & DEVICES FOR THERMOPHOTOVOLTAIC (TPV) POWER GENERATION
Chakraburtty, Manisha (2016-12-16)IV-VI semiconductors, with direct gap conduction and valence band extrema at the L-point in k-space, are characterized by four-fold L-valley degeneracy. Prior work [1] has shown that this degeneracy can be removed with ... -
J/psi meson production in association with a W boson: Cross section ratio measurement with the ATLAS detector using 8 TeV pp data from the Large Hadron Collider at CERN
Bertsche, David (2016-05-13)The production mechanism of charmonium particles in hadronic collisions is not fully understood and is an active area of research. These mechanisms can be studied by examining the associated production of charmonium particles ... -
MICROWAVE AND SURFACE ELECTROMETRY WITH RYDBERG ATOMS
Sedlacek, Jonathon (2016)Measurements of microwave electric fields in rubidium vapor cells, and of static electric fields near quartz with cold rubidium are presented. The measurements are performed using electromagnetically induced transparency ... -
Molecular beam epitaxial growth of interband cascade structures with advances in InAs- and GaSb-based interband cascade lasers
Massengale, Jeremy (2023-04-21)Interband cascade lasers (ICLs) based on the type-II quantum well (QW) active region have attracted much interest over the years, in large part due to their low power consumption. Their operation hinges on two key features; ... -
MOLECULAR BEAM EPITAXY OF ANTIMONY QUANTUM WELLS FOR PROBING TOPOLOGICAL SURFACE STATES
Wickramasinghe, Kaushini (2017)A topoelectronic transition was predicted for an Sb quantum well (QW) as a function of QW thickness. Bulk Sb is a semimetal with a negative bandgap, with neither the conduction band minimum nor the valence band maximum at ... -
Molecular Beam Epitaxy of InAs, GaSb, AlSb Structures for Interband Cascade Devices
Ye, Hao (2016-08)The interband cascade (IC) family of devices has been extended beyond mid-infrared lasers to include photovoltaic (PV) and photodetector (PD) devices. These devices utilize the transition between conduction and valence ... -
MULTIPLE-STAGE INTERBAND CASCADE PHOTOVOLTAIC DEVICES USING 6.1 Å SEMICONDUCTOR MATERIALS
Hinkey, Robert (2013-12-13)Interband cascade photovoltaic (IC PV) structures are an attractive alternative to the conventional long-absorber diode structures currently used for mid-infrared photovoltaic devices. The unique feature of IC PV devices ... -
Quantum dots for Photovoltaic Applications
Cheng, Yang (2017-11)During the past century, impacts of climate change on both natural and human systems have been observed worldwide. Numerous scientific investigations suggest a strong correlation between the global warming and greenhouse ... -
Quantum Effects in Nodal-line Semimetals
Kim, Sang Wook (2020)Topological materials such as Dirac and Weyl semimetals have relativistic quasiparticles at a discrete number of points in the Brillouin zone. Those materials are semimetalas in the bulk but host metallic surface states ... -
Space Application of Novel Solar Cells
Afshari, Hadi (2023-05-12)Multiple solar cell technologies from three different generations of photovoltaic cells were studied for space applications. The GaAsSb, crystalline first-generation solar cells were studied under low-intensity-low-temperature ... -
Study of advanced resonant photonic gratings in the mid-infrared spectrum for the chemical sensing applications
Hemati, Tahere (2023-08-04)This dissertation focuses on developing advanced Mid-IR optical devices for chip-scale chemical sensing. Various Mid-IR techniques based on Beer-Lambert’s law offer valuable insights into molecular interactions but suffer ... -
THERMOPHOTOVOLTAIC DEVICES AND INFRARED PHOTODETECTORS BASED ON INTERBAND CASCADE STRUCTURES
Huang, Wenxiang (2020-05-08)Mid-infrared (IR) optoelectronic devices form the basis for many practical applications such as thermophotovoltaic (TPV) energy conversion, gas sensing, thermal imaging, medical diagnostics, free-space communications, ...