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Filtering by: Creator Hill, David Ray Remove constraint Creator: Hill, David Ray Academic Affiliation Physics Remove constraint Academic Affiliation: Physics Committee Member Jansen, Henri Remove constraint Committee Member: Jansen, Henri

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  • 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
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    Electromagnetic boundary conditions for anisotropic media . . . . . 62 2.17 Transmission ray trace through a thin

  • Computational nanooptics in hyperbolic metamaterials and plasmonic structures

    Creator:
    Thongrattanasiri, Sukosin
    Abstract:
    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 metamaterials based on interleaved highly-doped InGaAs and undoped AlInAs multilayer stacks. The experimental results confirm theoretical predictions, exhibiting broadband negative refraction response...
    Resource Type:
    Dissertation
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    Landau, Oksana Ostroverkhova, David McIntyre, Janet Tate, William Hetherington, Tomasz Giebultowicz

  • Optical, electronic, and thermodynamic properties of layered mixed anion compounds

    Creator:
    Vielma, Jason Michael
    Abstract:
    Mixed anion compounds that form ZrCuSiAs-type crystal structures exhibit remarkable properties such as superconductivity at low temperatures, hole conduction with optical transparency in the visible region, and exciton absorption at room temperature. In this thesis, properties of a selected group of materials out of the very large set of mixed...
    Resource Type:
    Dissertation
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    experience at Oregon State Uni- versity. I would also like to thank Henri Jansen, David Roundy, and Janet

  • Level structure of ¹⁵²Gd populated in ¹⁵²Tb β decay

    Creator:
    Stapels, Christopher John
    Abstract:
    As part of a research program to study the transitional region of N=88 isotones, ¹⁵²Tb was produced by the reaction ¹⁵¹Eu(α,3n)¹⁵²Tb in the 88" cyclotron located at LBNL. Gamma-ray spectroscopy of the radiation emitted from excited ¹⁵²Gd following the β⁺ decay of ¹⁵²Tb has been performed using an array of...
    Resource Type:
    Dissertation
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    " cyclotron located at LBNL. Gamma-ray spectroscopy of the radiation emitted from excited 152Gd following

  • 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
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    angle of refraction…34 2.13 Transmission and reflection of incident ray in a single layer (or three

  • A microscopic study of the interaction between aliovalent dopants and native defects in group IV oxides : indium and cadmium in ceria and zirconia

    Creator:
    Zacate, Matthew O.
    Abstract:
    In order to understand better the defect structure and dynamics associated with lower valent dopants complexed with native defects in group IV oxides, In/Cd perturbed angular correlation spectroscopy was performed in ceria and zirconia. Examining the orientation symmetry axis of defects in ceria single crystals at low temperature has allowed...
    Resource Type:
    Dissertation
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    PAC 52 3.2 -y-RAY EMISSION 56 3.3 NUCLEAR ALIGNMENT THROUGH ANGULAR CORRELATION . 63 3.4

  • Sub-diffraction light propagation and imaging in planar negative refraction waveguides

    Creator:
    Wangberg, Robyn
    Abstract:
    In this dissertation we study the electromagnetic properties of planar waveguides with non-magnetic strongly anisotropic dielectric cores. We develop an analytical description of the mode propagation in these systems and show that the index of refraction can be either positive or negative depending on the specific material parameters. Propagating modes...
    Resource Type:
    Dissertation
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    placed a distance f to the left of the slab at the origin. The arrows depict the ray paths from the

  • Amorphous TiO₂ : A Thin Film Synthesis Route to Stabilization of Metastable TiO₂ Brookite

    Creator:
    Haggerty, James E. S.
    Abstract:
    Structure-specific synthesis processes are of key importance to the growth of polymorphic functional compounds such as TiO₂, where material properties strongly depend on structure as well as chemistry. The robust growth of the brookite polymorph of TiO₂, a promising photocatalyst, has been difficult in both powder and thin-film forms due...
    Resource Type:
    Dissertation and Video
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    Ceder’s group. Initial PLD of films was performed at NREL by Lauren Garten in David Ginley’s group

  • 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....
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    Dissertation
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    devices such as the infamous x-ray scanner which is used to take a full body image of a person to look

  • Electromagnetic properties of anisotropic plasmonic metamaterials

    Creator:
    Elser, Justin Lee
    Abstract:
    In this dissertation we study the electromagnetic properties of plasmonic metamaterials. We develop an analytical description to solve the fundamental problem of free-space scattering in planar plasmonic systems by utilizing anisotropic metamaterials. We show with exact numerical simulations that these manufactured materials do completely eliminate the scattering, and even in...
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    Dissertation
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    surface optic paradigm is to have a complete analogue to 3D ray optics through the use of lenses, prisms