Surface plasmon transmission through discontinuous conducting surfaces: Plasmon amplitude modulation by grazing scattered fields | Zendy

L. A. Mayoral-Astorga | Zendy; Jorge Gaspar-Armenta | Zendy; Felipe Ramos-Mendieta | Zendy

Open Access

Surface plasmon transmission through discontinuous conducting surfaces: Plasmon amplitude modulation by grazing scattered fields

Author(s) -

L. A. Mayoral-Astorga,

Jorge Gaspar-Armenta,

Felipe Ramos-Mendieta

Publication year - 2016

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4948465

Subject(s) - optics , surface plasmon polariton , finite difference time domain method , surface plasmon , diffraction , plasmon , scattering , wavelength , slit , excited state , physics , materials science , atomic physics

We have studied numerically the diffraction of a surface plasmon polariton (SPP) when it encounters a wide multi-wavelength slit in conducting films. As a jump process a SPP is excited beyond the slit by wave scattering at the second slit edge. The exciting radiation is produced when the incident SPP collapses at the first slit edge. We have found that the transmitted SPP supports inherent and unavoidable interference with grazing scattered radiation; the spatial modulation extends to the fields in the diffraction region where a series of low intensity spots arises. We demonstrate that the SPP generated on the second slab depends on the frequency but not on the wave vector of the collapsed SPP; a SPP is transmitted even when the two metals forming the slit are different. The numerical results were obtained using the Finite Difference Time Domain (FDTD) method with a grid size λ/100

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