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Browsing Department of Physics by Author "Ostroverkhova, Oksana"

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Computational nanooptics in hyperbolic metamaterials and plasmonic structures

Thongrattanasiri, Sukosin (2010-09-02)

This dissertation concerns several problems in the fields of light interaction with nanostructured media, metamaterials, and plasmonics. We present a technique capable of extending operational bandwidth of hyperbolic met ...
Generating and using terahertz radiation to explore carrier dynamics of semiconductor and metal nanostructures

Jameson, Andrew D. (2012-01-20)

In this thesis, I present studies in the field of terahertz (THz) spectroscopy. These studies are divided into three areas: Development of a narrowband THz source, the study of carrier transport in metal thin films, and ...
An Ising-like model to predict dielectric properties of the relaxor ferroelectric solid solution BaTiO₃ − Bi(Zn₁/₂Ti₁/₂)O₃

Jackson, Dennis L. (2011-12-01)

We developed a model to investigate the dielectric properties of the BaTiO₃ − Bi(Zn₁/₂Ti₁/₂)O₃ (BT-BZT) solid solution, which is a relaxor ferroelectric and exhibits long range disorder. The model uses ab initio methods ...
Label free biosensing with carbon nanotube transistors

Leyden, Matthew R. (2011-06-10)

As electronics reach nanometer size scales, new avenues of integrating biology and electronics become available. For example, nanoscale field-effect transistors have been integrated with single neurons to detect neural a ...
Light-matter interactions : from the photophysics of organic semiconductors to high spatial resolution optical tweezer-controlled nanoprobes

Kendrick, Mark J. (2012-05-25)

Studies of light-matter interactions in organic semiconductors and in optical tweezer trapping of nanoparticles are presented. In the research related to organic semiconductor materials, a variety of novel materials and ...
Monte Carlo studies of classical Heisenberg spins on face-centered-cubic lattices : effects of strain, interlayer coupling, and dilution of lattice

Park, Seongweon (2012-12-17)

This thesis presents the results from Monte Carlo calculations on classical vector spins in face-centered-cubic (FCC) lattices. The goal of the study was to understand the effect of interlayer coupling, dilution of mag ...
The optical properties of multi-scale plasmonic structures and their applications in optical characterization and imaging

Kuhta, Nicholas Anthony (2012-07-09)

The optical response of metallic structures is dominated by the dynamics of their free electron plasma. Plasmonics, the area of optics specializing in the electromagnetic behavior of heterogeneous structures with metalli ...
Optical trapping and acoustical probing of ultrasound contrast agent microbubbles confined in capillaries

Almaqwashi, Ali (2012-03-21)

In an effort to develop an optical-acoustical understanding of ultrasound contrast agent microbubble dynamics in a micro-environment that resembles blood vessels, this thesis presents experimental work on optical trappin ...
Optoelectronic properties of organic semiconductor materials : from bulk to single molecule

Shepherd, Whitney E. B. (2012-12-06)

The behavior and application of organic semiconductor materials depend strongly on their molecular structure, and molecular interactions. Several studies of intermolecular interactions in functionalized polyacene materia ...
Organic semiconductor composites: influence of additives on the transient photocurrent

Day, Jonathan; Platt, Andrew D.; Ostroverkhova, Oksana; Subramanian, Sankar; Anthony, John E. (American Institute of Physics, 2009-01-09)

We report on the effect of various guest molecules added to a functionalized anthradithiophene (ADT) host on photoexcited charge carrier dynamics in solution-deposited thin films, from ~100 ps to >100 μs after photoexc ...
Synthesis and charge transport studies of stable, soluble hexacenes

Purushothaman, Balaji; Parkin, Sean R.; Kendrick, Mark J.; David, Daniel; Ward, Jeremy W.; Yu, Liyang; Stingelin, Natalie; Jurchescu, Oana D.; Ostroverkhova, Oksana; Anthony, John E. (Royal Society of Chemistry, 2012-06-26)

Acenes larger than pentacene are predicted to possess enticing electronic properties, but are insoluble and prone to rapid decomposition. Utilizing a combination of functionalization strategies, we present stable, soluti ...
Terahertz imaging and spectroscopy of carbon-based and semiconductor nanostructures

Tomaino, Joseph L. (2011-09-14)

This thesis will cover work that I have completed relating to the field of terahertz (THz) science. My work has consisted of generating tunable, narrowband THz pulses in a table-top optical setup and using both narrow- a ...
Terahertz transmission & spectroscopy of vertically grown multi-walled carbon nanotube forests

Maizy, Louis (2012-12-03)

In this thesis, I present studies in the field of terahertz [THz] spectroscopy. It covers both the generation and detection of ultra-fast broadband THz pulses, as well as the transmission properties of vertically grown m ...