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  • The optical properties of multi-scale plasmonic structures and their applications in optical characterization and imaging

    Creator:
    Kuhta, Nicholas Anthony
    Abstract:
    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 metallic inclusions, is undergoing rapid development, fueled in part by recent progress in experimental fabrication techniques and novel theoretical approaches....
    Resource Type:
    Dissertation
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    Abstract approved: Viktor A. Podolskiy The optical response of metallic structures is dominated by the

  • Mode patterns in quadrupole resonator with anisotropic core

    Creator:
    Thongrattanasiri, Sukosin
    Abstract:
    This thesis deals with applications of uniaxial anisotropic crystals for microcavity resonators with partially chaotic underlying ray dynamics. We develop an implementation of the scattering matrix formalism, and relate the eigenvalues and eigenvectors of the scattering matrix to the field distribution of inside the system. Using the developed technique, we...
    Resource Type:
    Masters Thesis
    Full Text:
    Viktor A. Poldolskiy This thesis deals with applications of uniaxial anisotropic crystals for

  • Subwavelength light confinement and quantum chaos in micro- and nano-structured metamaterials

    Creator:
    Govyadinov, Alexander A.
    Abstract:
    This dissertation concerns a broad range of unique phenomena related to the light propagation at nano- and micro-scales. To access the nano-domain, we introduce anisotropy-based waveguides with positive- and negative-index modes. These novel structures allow energy propagation in subwavelength regions and, in contrast to surface waves, have the mode structure...
    Resource Type:
    Dissertation
    Full Text:
    am very grateful to my adviser, Prof. Viktor A. Podolskiy, for his contribution and guidance in this

  • 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...
    Resource Type:
    Dissertation
    Full Text:
    : Electromagnetic Properties of Anisotropic Plasmonic Metamaterials Abstract approved: Viktor A. Podolskiy In

  • 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
    Full Text:
    Planar Negative Refraction Waveguides Abstract approved: Viktor A. Podolskiy In this dissertation we

  • 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
    Full Text:
    : ____________________________________________________________ Viktor A. Podolskiy

  • Optimizing the superlens: manipulating geometry to enhance the resolution

    Creator:
    Podolskiy, Viktor A., Kuhta, Nicholas A., and Milton, Graeme W.
    Abstract:
    We analyze the performance of a planar lens based on realistic negative index material in a generalized geometry. We demonstrate that the conventional superlens design (where the lens is centered between the object and the image) is not optimal from the resolution point of view, develop an analytical expression for...
    Resource Type:
    Article
    Full Text:
    superlens: Manipulating geometry to enhance the resolution Viktor A. Podolskiya� and Nicholas A. Kuhta

  • Active metamaterials: sign of refractive index and gain-assisted dispersion management

    Creator:
    Govyadinov, Alexander A., Podolskiy, Viktor A., and Noginov, M.
    Abstract:
    We derive an approach to determine the causal direction of wavevectors of modes in optical metamaterials, which, in turn, determines signs of refractive index and impedance as a function of real and imaginary parts of dielectric permittivity and magnetic permeability. We use the developed technique to demonstrate that the interplay...
    Resource Type:
    Article
    Full Text:
    -assisted dispersion management Alexander A. Govyadinov and Viktor A. Podolskiya� Physics Department

  • Nonlocal effects in effective-medium response of nanolayered metamaterials

    Creator:
    Elser, Justin, Podolskiy, Viktor A., Salakhutdinov, Ildar, and Avrutsky, Ivan
    Abstract:
    The authors analyze electromagnetic modes in multilayered nanocomposites and demonstrate that the response of a majority of realistic layered structures is strongly affected by the nonlocal effects originating from strong field oscillations across the system, and is not described by conventional effective-medium theories. They develop the analytical description of the...
    Resource Type:
    Article
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    nanolayered metamaterials Justin Elser and Viktor A. Podolskiya� Department of Physics, Oregon State

  • Nanowire metamaterials with extreme optical anisotropy

    Creator:
    Elser, Justin, Wangberg, Robyn, Podolskiy, Viktor A., and Narimanov, Evgenii E.
    Abstract:
    The authors study perspectives of nanowire metamaterials for negative-refraction waveguides, high-performance polarizers, and polarization-sensitive biosensors. They demonstrate that the behavior of these composites is strongly influenced by the concentration, distribution, and geometry of the nanowires, derive an analytical description of electromagnetism in anisotropic nanowire-based metamaterials, and explore the limitations of...
    Resource Type:
    Article
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    Justin Elser, Robyn Wangberg, and Viktor A. Podolskiy Physics Department, 301 Weniger Hall, Oregon State