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  • 1
    Electronic Resource
    Electronic Resource
    Birefringent thin-film polarizers for use at normal incidence and with planar technologies (1999)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 74 (1999), S. 1794-1796 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We discuss the design and fabrication of an all-dielectric thin-film polarizer that is compatible with existing planar technologies. This polarizer consists of a stack of quarter-wave biaxial layers. Each quarter-wave layer is formed by reactive electron-beam evaporation, using a bideposition technique that causes a columnar structure to grow perpendicular to the substrate, produces large normal-incidence linear birefringence, and avoids thickness wedging that is inherent in tilted-columnar biaxial layers. p-polarized light that is incident on the polarizer encounters an index-matched stack and is transmitted, whereas s-polarized light is rejected by a coexisting high-reflectance stack. A fabrication figure-of-merit of ten film periods per decade in the extinction ratio has been achieved in practice for a titanium oxide/tantalum oxide polarizer. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.123088
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  • 2
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    Plasmon–phonon coupling in monolayer WS2 (2016)
    American Institute of Physics (AIP)
    Details
    Publication Date: 2016-03-29
    Description: The excitation of plasmon in metallic nanostructures produces intense and strongly localized near fields that enhance light-matter interaction. Here, we report plasmon–phonon coupling in monolayer WS 2 deposited with gold and silver nanoparticles. The Raman spectra reveal phonon modes arising from the coupling between plasmon and WS 2 . The localized surface plasmon resonance mediated excitation activates the Raman process without requiring defect for momentum conservation. Our results also reveal that the momentum induced by localized surface plasmon resonances losses to WS 2 and the metal atoms adsorption modulated spin–orbit split are the two essential elements for the observed plasmon–phonon coupling. This work will open up exciting prospects for plasmon–phonon coupling in two dimensional systems.
    Print ISSN: 0003-6951
    Electronic ISSN: 1077-3118
    Topics: Physics
    Published by American Institute of Physics (AIP)
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  • 3
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    On the generation of magnetic field enhanced microwave plasma line (2016)
    American Institute of Physics (AIP)
    Details
    Publication Date: 2016-12-09
    Description: Microwave linear plasmas sustained by surface waves have attracted much attention due to the potential abilities to generate large-scale and uniform non-equilibrium plasmas. An external magnetic field was generally applied to enhance and stabilize plasma sources because the magnetic field decreased the electron losses on the wall. The effects of magnetic field on the generation and propagation mechanisms of the microwave plasma were tentatively investigated based on a 2-D numerical model combining a coupled system of Maxwell's equations and continuity equations. The mobility of electrons and effective electric conductivity of the plasma were considered as a full tensor in the presence of magnetic field. Numerical results indicate that both cases of magnetic field in the axial-direction and radial-direction benefit the generation of a high-density plasma; the former one allows the microwave to propagate longer in the axis direction compared to the latter one. The time-averaged power flow density and the amplitude of the electric field on the inner rod of coaxial waveguide attenuate with the propagation of the microwave for both cases of with and without external magnetic field. The attenuation becomes smaller in the presence of appropriately higher axial-direction magnetic field, which allows more microwave energies to transmit along the axial direction. Meanwhile, the anisotropic properties of the plasma, like electron mobility, in the presence of the magnetic field confine more charged particles in the direction of the magnetic field line.
    Print ISSN: 1070-664X
    Electronic ISSN: 1089-7674
    Topics: Physics
    Published by American Institute of Physics (AIP)
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