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  • Terahertz Induced Non-linear Electron Dynamics in Nanoantenna Coated Semiconductors at the Sub-picosecond Timescale

    Creator:
    Stickel, Andrew
    Abstract:
    This dissertation is an exploration of the material response to Terahertz (THz) radiation. Specifically we will explore the ultrafast electron dynamics in the nonperturbative regime in semiconductors that have been patterned with nanoantenna arrays using broadband, high intensity, THz radiation. Three main semiconductor materials will be studied in this work....
    Resource Type:
    Dissertation
    Full Text:
    the degree of Doctor of Philosophy in Physics presented on August 10, 2016. Title: Terahertz Induced

  • A motor-generator and supercapacitor based system for microgrid frequency stabilization

    Creator:
    Crispo, Richard F.
    Abstract:
    This research introduces an energy storage system to deliver microgrid frequency response. A doubly-fed induction generator (DFIG) and a squirrel cage induction machine (SCIM) are coupled together as a motor/generator set to deliver an immediate inertial response to a change of frequency, and an inverter and supercapacitors deliver short term...
    Resource Type:
    Masters Thesis
    Full Text:
    (Continued) Page Article: Enhancing the Stability of an Autonomous Microgrid using DSTATCOM [10

  • Radiative Acceleration and Emission from Relativistic Outflows

    Creator:
    Chhotray, Atul
    Abstract:
    Outflowing streams of matter or jets are a common phenomenon in the observeduniverse. The most extreme and powerful jets are relativistic, i.e., they travel at speedscomparable to the of speed light. Gamma Ray-Bursts (GRBs) and Active Galactic Nuclei(AGNs) are two sources of these relativistic jets. In this work I will...
    Resource Type:
    Dissertation
    Full Text:
    of GRBs detected by Fermi/GBM. . . . . . . . . 10 1.10 The �ux F (E) for several spectra is depicted

  • Submerged jet impingement boiling thermal management

    Creator:
    Cardenas, Ruander
    Abstract:
    Technologies such as avionics and power electronics are driving the demand for thermal management schemes towards high heat fluxes and low surface temperatures. Typically, these applications require the dissipation of heat fluxes in the rage of 100-1000 W/cm² while maintaining surface temperatures lower than about 85 °C. Phase-change heat transfer...
    Resource Type:
    Dissertation
    Full Text:
    .................................................................................... 10 2.1 SINGLE-PHASE FORCED CONVECTION .......................................................... 10

  • Nonlinear Terahertz Spectroscopy and imaging of Carbon Nanomaterials

    Creator:
    Lee, Byounghwak
    Abstract:
    This dissertation presents nonlinear terahertz (THz) properties of carbon nanomaterials investigated by time-resolved high-field THz spectroscopy. In order to determine THz characteristics of nanomaterials, we performed THz power spectrum measurement, THz raster imaging, THz time-domain spectroscopy (THz-TDS) and time-resolved pump-probe experiment on two different types of single layer graphene and...
    Resource Type:
    Dissertation
    Full Text:
    laser pulses (pulse energy, 1 mJ; pulse duration, 100 fs; repetition rate, 1 kHz) with titled pulse

  • Nonlinear terahertz spectroscopy of carbon nanomaterials and semiconductor nanostructures

    Creator:
    Paul, Michael Jason
    Abstract:
    This thesis will cover my work relating to the developing field of terahertz (THz) science and technology. It will present experimental and theoretical studies investigating the optical and electrical properties of various material systems using novel THz imaging and spectroscopy techniques. Due to its low photon energy, THz imaging and...
    Resource Type:
    Dissertation
    Full Text:
    . The fields are strong enough to generate high density free carriers (Ne > 10 17 cm−3) via high-energy

  • Contribution from two on-shell pion exchange in nucleon-nucleon scattering

    Creator:
    Kheaomaingam, Nupan
    Abstract:
    We used recent phenomenological form factors to calculate the effect of on-shell two-pion exchange in nucleon-nucleon scattering below the two-pion production threshold. As expected, the contributions of partial wave amplitudes are all negligible. We also noticed that the relativistic spin-operator decomposition of the scattering amplitude is not unique at certain...
    Resource Type:
    Dissertation
    Full Text:
    10 4 CONCLUSION 37 BIBLIOGRAPHY 38 APPENDICES 40 Appendix A Traces of Operators 41

  • Introductory Physics 20X Comparative Study

    Creator:
    Frey, Brooke
    Abstract:
    The Introductory Physics 20X series has developed an advanced, metacognitive curriculum which requires a high degree of active learning in order for students to succeed in the class. Recently, the series has been transferred to the online campus, Ecampus, and is now available for distance learners. My work is focused...
    Resource Type:
    Honors College Thesis
    Full Text:
    classroom structure with goals of improving learning outcomes [10]. A flipped classroom approach was

  • Optoelectronic properties of organic semiconductor materials : from bulk to single molecule

    Creator:
    Shepherd, Whitney E. B.
    Abstract:
    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 materials are presented. The degree and onset of aggregation of a functionalized anthradithiophene derivative was studied as a function of concentration in two different host...
    Resource Type:
    Dissertation
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    3.4 PL spectra of C(3.6×10−3) with peak identifications based on Table 3.2 58 LIST OF FIGURES

  • Design, construction, and characterization of a neutron depth profiling facility at the Oregon State University TRIGA® reactor with an advanced digital spectroscopy system

    Creator:
    Robinson, Joshua A.
    Abstract:
    In this work, Neutron Depth Profiling (NDP) analysis capability has been added to the Oregon State University TRIGA® Reactor Prompt Gamma Neutron Activation Analysis Facility (PGNAA). This system has been implemented with an advanced digital spectroscopy system and is capable of rise time pulse shape analysis as well as coincidence...
    Resource Type:
    Dissertation
    Full Text:
    instantaneously (~10 fs) and emits decay radiation characteristic of the isotope and the reaction type