Hydrodynamic modeling of surface plasmon enhanced photon induced current in a gold grating | Zendy

A. T. English | Zendy; Cheng-Wen Cheng | Zendy; Lloyd Lowe | Zendy; MinHsiung Shih | Zendy; Wan Kuang | Zendy

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Hydrodynamic modeling of surface plasmon enhanced photon induced current in a gold grating

Author(s) -

A. T. English,

Cheng-Wen Cheng,

Lloyd Lowe,

MinHsiung Shih,

Wan Kuang

Publication year - 2011

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.3590200

Subject(s) - grating , surface plasmon , plasmon , photon , wavelength , electron , physics , optics , slab , semiclassical physics , electromagnetic field , condensed matter physics , molecular physics , quantum , quantum mechanics , geophysics

The current induced by incident photons on an gold grating slab is investigated numerically and experimentally. A semiclassical electrodynamic model is developed under the weak nonlinearity approximation. Electrons in the conduction band are treated as an electron gas in the presence of a self-consistent electromagnetic field. The model is solved by the finite element method and compared with measurements. The calculated current density as a function of incident angle and wavelength is found to be in qualitative agreement with the experimental measurements. The results show that increasing surface plasmon spatial variation enhances photon induced current.

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