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Filtering by: Creator Taylor, Kendrick C. Remove constraint Creator: Taylor, Kendrick C. Academic Affiliation Physics Remove constraint Academic Affiliation: Physics Degree Level Bachelor's Remove constraint Degree Level: Bachelor's

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  • Optical Tweezer Trapping of Colloidal Polystyrene and Silica Microspheres

    Creator:
    Peters, Kyle C.
    Abstract:
    Optical trapping is a tool used throughout a wide variety of disciplines rang- ing from precisely probing and manipulating sub-micron organisms in biol- ogy to analyzing fundamental charge transfer in colloidal physics. This thesis presents research involving optical tweezer force measurements of polystyrene and silica microspheres. In addition, preliminary work...
    Resource Type:
    Undergraduate Thesis
    Full Text:
    C. Peters An Undergraduate Thesis Submitted to Oregon State University In partial fulfillment for

  • A Study of Charging Behaviors in Organic Semiconductors using Optical Trapping

    Creator:
    Founds, Graham M.
    Abstract:
    We measure the charging and discharging of two organic materials, PCBM and ADT-TES-F. These materials are studied through the noncontact method of particle trapping known as Optical Tweezers, where an IR laser is used to constrain the motion of a coated or noncoated silica sphere while its positional data is...
    Resource Type:
    Undergraduate Thesis
    Full Text:
    histogram. C) The frequency power spectrum of the sphere’s motion. Displays the frequency spectrum of the

  • Study of Organic Semiconductors Using Time-Resolved Charge Measurements at the Microscale

    Creator:
    Wallace, Richard
    Abstract:
    Understanding charge transfer in organic semiconductors is important for developing devices like organic light emitting diodes and flexible electronics. Optical tweezers have been used in many disciplines for trapping, manipulating, and analyzing microscopic objects such as microspheres, micro-organisms, and other colloidal particles. Using optical tweezers, studies have measured the average...
    Resource Type:
    Undergraduate Thesis
    Full Text:
    holder (c). . . . 12 3.2 The experimental setup for the trapping of coated microspheres . . . . . . 13

  • Optoelectronic Properties of a Novel Fungi-derived Pigment

    Creator:
    Wiesner, Cameron
    Abstract:
    In industry, there is considerable interest in finding sustainable, renewable materials for use in electronic devices. Pigments derived from spalting fungi are of particular interest due to their longevity in diverse environmental conditions. The focus of my project was to characterizethe properties of a novel, fungi-derived pigment, and to discover...
    Resource Type:
    Undergraduate Thesis
    Full Text:
    .) ganodermophthorum​ is a spalting, or wood-staining, fungus similar to Chlorociboria (C.) aeruginosa​, the spalting

  • The Impact of Crystal Morphology on the Opto-Electronic Properties of Amorphous and Organic Crystalline Materials

    Creator:
    Brandt, Gregory Mirek
    Abstract:
    Organic aggregates and transparent amorphous metals are transforming opto-electronic devices such as highly efficiency solar cells and flexible displays. We present a fundamental optical study of how local morphology critically impacts the device performance of both stacked, conjugated organics and In-Ga-Zn-O (IGZO) transparent metallic materials. Derivatives of anthradithiophene (ADT): ADTTES-F,...
    Resource Type:
    Undergraduate Thesis
    Full Text:
    the plane of polarization (plane of the substrate), while the c axis is out of the plane and thus

  • Towards Molybdenum Disulfide Exciton-Polaritons in Metallic Microcavities

    Creator:
    Embleton, Clark
    Abstract:
    Exciton-polaritons are a form of light-matter coupling that have potential applications as photonic transistors and logic gates. In order for a photonic transistor or logic gate to be integrated with room temperature fiber-optic technology, excitons-polaritons need to be stable at room temperature and compatible with the red and near-infrared wavelengths...
    Resource Type:
    Undergraduate Thesis
    Full Text:
    frequency 𝑑p = 𝑐 𝜔p , where 𝑐 is the speed of light. For silver the plasma frequency is 1.36 × 1016Hz

  • Calculating characteristic timescales for environmental decoherence in the presence of thermal gravitons

    Creator:
    Nelson, Hunter
    Abstract:
    Different models show the effects of environmental decoherence on a quantum system due to various environments of interest. One important quantity within these models is the decoherence time, which tells us how quickly environments wash away the coherence of local measurements. We can describe this effect as the quantum system...
    Resource Type:
    Undergraduate Thesis
    Full Text:
    operator ρ = ∑ i,j c∗jci |ψi〉 〈ψj | . (2.1.3) An interesting note to make about 2.1.3 is regarding the i

  • Plasmon Induced Transparency in Terahertz Metamaterials

    Creator:
    Meyers, Joseph
    Abstract:
    Plasmon induced transparency (PIT) describes a spectral response of coupled plasmonic resonators in that coupling between bright and dark modes leads to a destructive interference resulting in a narrow transparency window. This process has many applications in material characterization and advanced optical devices such as slow light devices or ultrafast...
    Resource Type:
    Undergraduate Thesis
    Full Text:
    patterned upon. ii c©Copyright by Joseph Meyers May 25, 2019 All Rights Reserved Plasmon Induced

  • Effect of Solar System Models on Pulsar Timing Experiments

    Creator:
    Nicolaysen, Cooper
    Abstract:
    Gravitational wave (GW) astronomy is a key ingredient in confirming Einstein’s theory of General Relativity and showing how the universe sends ripples through spacetime, distorting distances between two points. The confirmation of high-frequency GWs observed by The Laser Interferometer Gravitational-Wave Observatory (LIGO) in 2015 was a breakthrough in our understanding...
    Resource Type:
    Undergraduate Thesis
    Full Text:
    me in with open arms. A special thanks to Jacob Taylor for his supervision and Nima Laal for the use

  • Characterizing Optical Signatures of TiO₂ Amorphous Precursors

    Creator:
    Berry, Patrick
    Abstract:
    TiO₂ typically crystallizes into three polymorphs: brookite, rutile, and anatase. The phase selection problem in TiO₂ is the lack of understanding what conditions cause amorphous TiO₂ to crystallize into one of its three polymorphs during an annealing process. It has been recently shown that phase selection in TiO₂ is highly...
    Resource Type:
    Undergraduate Thesis
    Full Text:
    ., Sotelo-Vazquez, C., Taylor, A., Parkin, I. P. Chemical Vapor Deposition of Photocatalytically Active