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S.v. Dukhopelnykov - One of the best experts on this subject based on the ideXlab platform.

  • Combined plasmon-resonance and photonic-jet effect in the THz wave scattering by dielectric rod decorated with graphene strip
    Journal of Applied Physics, 2019
    Co-Authors: S.v. Dukhopelnykov, Ronan Sauleau, Maria Garcia-vigueras, Alexander I. Nosich
    Abstract:

    We consider the scattering of an H-polarized plane wave by an infinite dielectric rod with a conformal graphene strip of arbitrary Angular Width, placed at the rod rear side. Our analysis is based on the hypersingular integral equation for the current induced on the strip. Discretization of this equation is carried out by the Nystrom-type method, which has a guaranteed convergence. This meshless trusted computational instrument enables us to plot the dependences of the absorption cross section and the total scattering cross section on the strip Angular Width and the frequency, in a wide range from 1 GHz to 6 THz. We concentrate our analysis on studying the interplay between the broadband photonic-jet effect of the dielectric rod and the reasonably high-Q resonances on the plasmon modes of the graphene strip. It is found that as the photonic jet becomes brighter with higher frequencies, the plasmon-mode resonances become more intensive as well.We consider the scattering of an H-polarized plane wave by an infinite dielectric rod with a conformal graphene strip of arbitrary Angular Width, placed at the rod rear side. Our analysis is based on the hypersingular integral equation for the current induced on the strip. Discretization of this equation is carried out by the Nystrom-type method, which has a guaranteed convergence. This meshless trusted computational instrument enables us to plot the dependences of the absorption cross section and the total scattering cross section on the strip Angular Width and the frequency, in a wide range from 1 GHz to 6 THz. We concentrate our analysis on studying the interplay between the broadband photonic-jet effect of the dielectric rod and the reasonably high-Q resonances on the plasmon modes of the graphene strip. It is found that as the photonic jet becomes brighter with higher frequencies, the plasmon-mode resonances become more intensive as well.

  • Combined plasmon-resonance and photonic-jet effect in the THz wave scattering by dielectric rod decorated with graphene strip
    Journal of Applied Physics, 2019
    Co-Authors: S.v. Dukhopelnykov, Ronan Sauleau, Maria Garcia-vigueras, Alexander I. Nosich
    Abstract:

    We consider the scattering of an H-polarized plane wave by an infinite dielectric rod with a conformal graphene strip of arbitrary Angular Width, placed at the rod rear side. Our analysis is based on the hypersingular integral equation for the current induced on the strip. Discretization of this equation is carried out by the Nystrom-type method, which has a guaranteed convergence. This meshless trusted computational instrument enables us to plot the dependences of the absorption cross-section (ACS) and the total scattering cross-section (TSCS) on the strip Angular Width and the frequency, in wide range from 1 GHz to 6 THz. We concentrate our analysis on studying the interplay between the broadband photonic-jet effect of dielectric rod and the reasonably high-Q resonances on the plasmon modes of graphene strip. It is found that as the photonic jet becomes brighter with higher frequencies, the plasmon-mode resonances become more intensive as well.

  • Scattering and Absorption of the H-polarized Plane Wave of THz Range by a Circularly Curved Graphene Strip in the Free Space
    2019
    Co-Authors: S.v. Dukhopelnykov, M.g. Vigueras, Ronan Sauleau
    Abstract:

    We consider the scattering of an H-polarized plane wave by an infinite circularly curved graphene strip of arbitrary Angular Width, placed in the free space. Our analysis is based on the hypersingular integral equation for the current induced on the strip. Discretization of this equation is carried out by the Nystrom-type method that has a guaranteed convergence. This trusted computational instrument enables us to plot the dependences of the extinction cross-section (ECS) on the frequency, strip Angular Width and physical Width, and its radius of curvature. We derive approximate equation for the resonance frequencies of the graphene plasmon modes and demonstrate its agreement with full-wave computations in the THz range. © 2019 IEEE.

  • Scattering and Absorption of the H-polarized Plane Wave of THz Range by a Circularly Curved Graphene Strip in the Free Space
    2019 IEEE 39th International Conference on Electronics and Nanotechnology (ELNANO), 2019
    Co-Authors: S.v. Dukhopelnykov, M.g. Vigueras, Ronan Sauleau
    Abstract:

    We consider the scattering of an H-polarized plane wave by an infinite circularly curved graphene strip of arbitrary Angular Width, placed in the free space. Our analysis is based on the hypersingular integral equation for the current induced on the strip. Discretization of this equation is carried out by the Nystrom-type method that has a guaranteed convergence. This trusted computational instrument enables us to plot the dependences of the extinction cross-section (ECS) on the frequency, strip Angular Width and physical Width, and its radius of curvature. We derive approximate equation for the resonance frequencies of the graphene plasmon modes and demonstrate its agreement with full-wave computations in the THz range.

  • Analysis of Combined Plasmon-Resonance and Photonic-Jet Effects in the THz Wave Scattering by Dielectric Rod with Graphene Strip
    2019 49th European Microwave Conference (EuMC), 2019
    Co-Authors: S.v. Dukhopelnykov
    Abstract:

    We consider the scattering of an H-polarized plane wave by an infinite dielectric rod with a conformal graphene strip of arbitrary Angular Width, placed at the rod rear side. Our analysis is based on the hypersingular integral equation for the current induced on the strip. Discretization of this equation is carried out by the Nystrom-type method, which has a guaranteed convergence. This meshless trusted computational instrument enables us to plot the dependences of the absorption cross-section (ACS) and the total scattering cross-section (TSCS) on the frequency and strip Angular Width. We concentrate our analysis on studying the interplay between the broadband photonic-jet effect of dielectric rod and the reasonably high-Q resonances on the plasmon modes of graphene strip.

Alexander I. Nosich - One of the best experts on this subject based on the ideXlab platform.

  • Combined plasmon-resonance and photonic-jet effect in the THz wave scattering by dielectric rod decorated with graphene strip
    Journal of Applied Physics, 2019
    Co-Authors: S.v. Dukhopelnykov, Ronan Sauleau, Maria Garcia-vigueras, Alexander I. Nosich
    Abstract:

    We consider the scattering of an H-polarized plane wave by an infinite dielectric rod with a conformal graphene strip of arbitrary Angular Width, placed at the rod rear side. Our analysis is based on the hypersingular integral equation for the current induced on the strip. Discretization of this equation is carried out by the Nystrom-type method, which has a guaranteed convergence. This meshless trusted computational instrument enables us to plot the dependences of the absorption cross section and the total scattering cross section on the strip Angular Width and the frequency, in a wide range from 1 GHz to 6 THz. We concentrate our analysis on studying the interplay between the broadband photonic-jet effect of the dielectric rod and the reasonably high-Q resonances on the plasmon modes of the graphene strip. It is found that as the photonic jet becomes brighter with higher frequencies, the plasmon-mode resonances become more intensive as well.We consider the scattering of an H-polarized plane wave by an infinite dielectric rod with a conformal graphene strip of arbitrary Angular Width, placed at the rod rear side. Our analysis is based on the hypersingular integral equation for the current induced on the strip. Discretization of this equation is carried out by the Nystrom-type method, which has a guaranteed convergence. This meshless trusted computational instrument enables us to plot the dependences of the absorption cross section and the total scattering cross section on the strip Angular Width and the frequency, in a wide range from 1 GHz to 6 THz. We concentrate our analysis on studying the interplay between the broadband photonic-jet effect of the dielectric rod and the reasonably high-Q resonances on the plasmon modes of the graphene strip. It is found that as the photonic jet becomes brighter with higher frequencies, the plasmon-mode resonances become more intensive as well.

  • Combined plasmon-resonance and photonic-jet effect in the THz wave scattering by dielectric rod decorated with graphene strip
    Journal of Applied Physics, 2019
    Co-Authors: S.v. Dukhopelnykov, Ronan Sauleau, Maria Garcia-vigueras, Alexander I. Nosich
    Abstract:

    We consider the scattering of an H-polarized plane wave by an infinite dielectric rod with a conformal graphene strip of arbitrary Angular Width, placed at the rod rear side. Our analysis is based on the hypersingular integral equation for the current induced on the strip. Discretization of this equation is carried out by the Nystrom-type method, which has a guaranteed convergence. This meshless trusted computational instrument enables us to plot the dependences of the absorption cross-section (ACS) and the total scattering cross-section (TSCS) on the strip Angular Width and the frequency, in wide range from 1 GHz to 6 THz. We concentrate our analysis on studying the interplay between the broadband photonic-jet effect of dielectric rod and the reasonably high-Q resonances on the plasmon modes of graphene strip. It is found that as the photonic jet becomes brighter with higher frequencies, the plasmon-mode resonances become more intensive as well.

Ronan Sauleau - One of the best experts on this subject based on the ideXlab platform.

  • Combined plasmon-resonance and photonic-jet effect in the THz wave scattering by dielectric rod decorated with graphene strip
    Journal of Applied Physics, 2019
    Co-Authors: S.v. Dukhopelnykov, Ronan Sauleau, Maria Garcia-vigueras, Alexander I. Nosich
    Abstract:

    We consider the scattering of an H-polarized plane wave by an infinite dielectric rod with a conformal graphene strip of arbitrary Angular Width, placed at the rod rear side. Our analysis is based on the hypersingular integral equation for the current induced on the strip. Discretization of this equation is carried out by the Nystrom-type method, which has a guaranteed convergence. This meshless trusted computational instrument enables us to plot the dependences of the absorption cross section and the total scattering cross section on the strip Angular Width and the frequency, in a wide range from 1 GHz to 6 THz. We concentrate our analysis on studying the interplay between the broadband photonic-jet effect of the dielectric rod and the reasonably high-Q resonances on the plasmon modes of the graphene strip. It is found that as the photonic jet becomes brighter with higher frequencies, the plasmon-mode resonances become more intensive as well.We consider the scattering of an H-polarized plane wave by an infinite dielectric rod with a conformal graphene strip of arbitrary Angular Width, placed at the rod rear side. Our analysis is based on the hypersingular integral equation for the current induced on the strip. Discretization of this equation is carried out by the Nystrom-type method, which has a guaranteed convergence. This meshless trusted computational instrument enables us to plot the dependences of the absorption cross section and the total scattering cross section on the strip Angular Width and the frequency, in a wide range from 1 GHz to 6 THz. We concentrate our analysis on studying the interplay between the broadband photonic-jet effect of the dielectric rod and the reasonably high-Q resonances on the plasmon modes of the graphene strip. It is found that as the photonic jet becomes brighter with higher frequencies, the plasmon-mode resonances become more intensive as well.

  • Combined plasmon-resonance and photonic-jet effect in the THz wave scattering by dielectric rod decorated with graphene strip
    Journal of Applied Physics, 2019
    Co-Authors: S.v. Dukhopelnykov, Ronan Sauleau, Maria Garcia-vigueras, Alexander I. Nosich
    Abstract:

    We consider the scattering of an H-polarized plane wave by an infinite dielectric rod with a conformal graphene strip of arbitrary Angular Width, placed at the rod rear side. Our analysis is based on the hypersingular integral equation for the current induced on the strip. Discretization of this equation is carried out by the Nystrom-type method, which has a guaranteed convergence. This meshless trusted computational instrument enables us to plot the dependences of the absorption cross-section (ACS) and the total scattering cross-section (TSCS) on the strip Angular Width and the frequency, in wide range from 1 GHz to 6 THz. We concentrate our analysis on studying the interplay between the broadband photonic-jet effect of dielectric rod and the reasonably high-Q resonances on the plasmon modes of graphene strip. It is found that as the photonic jet becomes brighter with higher frequencies, the plasmon-mode resonances become more intensive as well.

  • Scattering and Absorption of the H-polarized Plane Wave of THz Range by a Circularly Curved Graphene Strip in the Free Space
    2019
    Co-Authors: S.v. Dukhopelnykov, M.g. Vigueras, Ronan Sauleau
    Abstract:

    We consider the scattering of an H-polarized plane wave by an infinite circularly curved graphene strip of arbitrary Angular Width, placed in the free space. Our analysis is based on the hypersingular integral equation for the current induced on the strip. Discretization of this equation is carried out by the Nystrom-type method that has a guaranteed convergence. This trusted computational instrument enables us to plot the dependences of the extinction cross-section (ECS) on the frequency, strip Angular Width and physical Width, and its radius of curvature. We derive approximate equation for the resonance frequencies of the graphene plasmon modes and demonstrate its agreement with full-wave computations in the THz range. © 2019 IEEE.

  • Scattering and Absorption of the H-polarized Plane Wave of THz Range by a Circularly Curved Graphene Strip in the Free Space
    2019 IEEE 39th International Conference on Electronics and Nanotechnology (ELNANO), 2019
    Co-Authors: S.v. Dukhopelnykov, M.g. Vigueras, Ronan Sauleau
    Abstract:

    We consider the scattering of an H-polarized plane wave by an infinite circularly curved graphene strip of arbitrary Angular Width, placed in the free space. Our analysis is based on the hypersingular integral equation for the current induced on the strip. Discretization of this equation is carried out by the Nystrom-type method that has a guaranteed convergence. This trusted computational instrument enables us to plot the dependences of the extinction cross-section (ECS) on the frequency, strip Angular Width and physical Width, and its radius of curvature. We derive approximate equation for the resonance frequencies of the graphene plasmon modes and demonstrate its agreement with full-wave computations in the THz range.

Edwin H. Lock - One of the best experts on this subject based on the ideXlab platform.

  • Superdirectional Beam of Surface Spin Wave
    EPL (Europhysics Letters), 2018
    Co-Authors: A. Annenkov, S. V. Gerus, Edwin H. Lock
    Abstract:

    The visualized diffraction patterns of a surface spin wave excited by an arbitrarily oriented linear transducer are investigated experimentally in the plane of a tangentially magnetized ferrite film for the case in which the transducer length D is much larger than the wavelength . It is shown experimentally and theoretically that the Angular Width of a diffracted surface spin wave beam in an anisotropic ferrite film can take values greater or less than and can also be zero. For the last case a superdirectional (non-expanding) beam of the surface spin wave is observed experimentally: the smearing of the beam energy along the film plane is absent and the length of the beam trajectory is maximal . It is found that the well-known Rayleigh criterion used in isotropic media cannot be used to estimate the Angular Width of spin wave beams. The experimental results are in good agreement with theoretical investigations, predictions, calculations and formulas obtained recently.

  • Angular beam Width of a slit-diffracted wave with noncollinear group and phase velocities
    Physics-Uspekhi, 2012
    Co-Authors: Edwin H. Lock
    Abstract:

    Taking magnetostatic surface wave diffraction as an example, this paper theoretically investigates the 2D diffraction pattern arising in the far-field region of a ferrite slab in the case of a plane wave with noncollinear group and phase velocities incident on a wide, arbitrarily oriented slit in an opaque screen. A universal analytical formula for the Angular Width of a diffracted beam is derived, which is valid for magnetostatic and other types of waves in anisotropic media and structures (including metamaterials) in 2D geometries. It is shown that the Angular Width of a diffracted beam in an anisotropic medium can not only take values greater or less than (where is the incident wavelength, and is the slit Width), but can also be zero under certain conditions.

  • On the Angular Width of Diffractive Beam in Anisotropic Media
    arXiv: Classical Physics, 2011
    Co-Authors: Edwin H. Lock
    Abstract:

    2-D diffraction patterns arising in the far-field region were investigated theoretically for the case, when the plane wave with non collinear group and phase velocities is incident on the wide slit in opaque screen with arbitrary orientation. This investigation was carried out by consideration as an example of magnetostatic surface wave diffraction in tangentially magnetized ferrite slab. It was deduced the universal analytical formula, which one can use to calculate the Angular Width of diffractive beam in any 2-D anisotropic geometries for the waves of various nature. It was shown, that in 2-D anisotropic geometries this Width may be not only more or less then the value L/D (L - wavelength of incident wave, D - length of slit), but it also may be equal to zero in certain conditions.

Cong Ye - One of the best experts on this subject based on the ideXlab platform.

  • retinal nerve fiber layer imaging with spectral domain optical coherence tomography pattern of rnfl defects in glaucoma
    Ophthalmology, 2010
    Co-Authors: Christopher Kaishun Leung, Nathan Choi, Robert N Weinreb, Cong Ye
    Abstract:

    Objective To characterize the distribution pattern, Angular Width, and area of retinal nerve fiber layer (RNFL) defects in glaucoma using spectral-domain optical coherence tomography (OCT). Design Prospective, cross-sectional study. Participants We included 113 normal subjects and 116 glaucoma patients. Methods One eye from each individual was randomly selected for Cirrus HD-OCT (Carl Zeiss Meditec Inc., Dublin, CA) RNFL imaging of the 6 × 6-mm 2 parapapillary region. The RNFL defects were identified in the RNFL thickness deviation map as superpixels coded in red. The Angular location and the Angular Width of RNFL defects were measured. The proportion of area with RNFL measurements within the normal ranges in the RNFL thickness deviation map was expressed as the RNFL area index (RAI): 1 – [area of superpixels coded in red/(6 × 6 – optic disc and parapapillary atrophic area)]. The diagnostic performance between RAI and average RNFL thickness was compared with the area under the receiver operating characteristic curve after adjusting refraction, signal strength, optic disc, and parapapillary atrophic areas. Main Outcome Measures Frequency distribution profiles and distribution patterns of RNFL defects, diagnostic sensitivity and specificity of RAI, and average RNFL thickness. Results The RNFL defects in glaucoma were most frequently found at the inferotemporal meridian at 284° (80.4%), followed by the superotemporal meridians at 73° (54.2%). The respective proportions of localized (Angular Width ≤30°) and diffuse (Angular Width >30°) RNFL defects were 11.4% and 70.5% in mild glaucoma (MD≥6 dB), and 4.2% and 94.5% in moderate to advanced glaucoma (MD Conclusions Analysis of the pattern of RNFL defects with spectral domain OCT imaging offers important insights in understanding the characteristics of RNFL damage. As RNFL defects expand in size as the disease progresses, measurement of the Angular Width and area of RNFL defects can provide an additional dimension for evaluation of glaucoma. Financial Disclosure(s) Proprietary or commercial disclosure may be found after the references.