Resonances in reflection, transmission and absorption of 1-D triangular-relief metallic gratings

We present numerical simulations in order to investigate the resonances in reflection, transmission, and absorption of surface plasmons for triangular gratings. The results reveal a number of resonances depending of grating geometrical parameters, surface materials, and characteristics of incident l...

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Bibliographic Details
Published in:Indian journal of physics 2017-02, Vol.91 (2), p.149-155
Main Authors: Sassi, Imed, Dhibi, Abdelhak, Oumezzine, Mohamed
Format: Article
Language:English
Subjects:
Absorption
Astrophysics and Astroparticles
Incident light
Mathematical models
Numerical analysis
Original Paper
Physics
Physics and Astronomy
Plasmons
Propagation
Reflection
Surface chemistry
Texts
Wavelengths
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Summary:We present numerical simulations in order to investigate the resonances in reflection, transmission, and absorption of surface plasmons for triangular gratings. The results reveal a number of resonances depending of grating geometrical parameters, surface materials, and characteristics of incident light. For metals Cu, Ag, Au, Ni, Pd, and Pt, the intensive weakly flat grating-resonance at TM-polarized incident light under normal direction is at wavelength λ = 0.83 ± 0.01 μ m , and a weaker grating resonance is at wavelength around 0.46 μ m . For strongly flat grating weak resonances appear for some metals, and disappear for others.
ISSN:0973-1458
0974-9845
DOI:10.1007/s12648-016-0910-1