scholarly journals TLM Z-transform method modelling of Lossy Grin MTM with different refractive index profiles

2012 ◽  
Vol 25 (2) ◽  
pp. 103-112
Author(s):  
Nebojsa Doncov ◽  
Tatjana Asenov ◽  
Zoran Stankovic ◽  
John Paul ◽  
Bratislav Milovanovic
Keyword(s):  
Refractive Index ◽  
3D Model ◽  
Three Dimensional ◽  
Refractive Index Profile ◽  
Index Profile ◽  
Transmission Line Matrix ◽  
Hyperbolic Tangent ◽  
Transform Method ◽  
Left Handed ◽  
The Time Domain

In this paper, a numerical three-dimensional (3D) model of electromagnetic lefthanded metamaterials (LH MTM) is applied for the modelling of composite right-left handed (RH/LH) structures with a graded refractive index profile commonly named GRIN MTM. The core of this model is Transmission Line Matrix (TLM) Z-transform method that incorporates the Drude function to account for dispersive LH MTM properties in the time-domain. Lossy GRIN slabs with abrupt, hyperbolic tangent, cosine, and linear refractive index profiles have been considered. The accuracy, efficiency and stability of the proposed approach are verified using analytical solution.

Three-dimensional refractive index profile of a GRIN optical waveguide using multiple beam interference fringes

2001 ◽  
Vol 191 (1-2) ◽  
pp. 39-47 ◽  
Author(s):  
N. Barakat ◽  
H.A. El-Hennawi ◽  
E.Abd. El-Ghafar ◽  
H. El-Ghandoor ◽  
R. Hassan ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Waveguide ◽  
Three Dimensional ◽  
Refractive Index Profile ◽  
Index Profile ◽  
Multiple Beam ◽  
Interference Fringes

scholarly journals Influence of Rugate Filters on the Spectral Manifestation of Tamm Plasmon Polaritons

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1282
Author(s):  
Victor Reshetnyak ◽  
Igor Pinkevych ◽  
Timothy Bunning ◽  
Dean Evans
Keyword(s):  
Refractive Index ◽  
Band Gap ◽  
External Medium ◽  
Metal Layer ◽  
Refractive Index Profile ◽  
Spectral Position ◽  
Index Profile ◽  
Reflection And Transmission ◽  
Rugate Filter ◽  
Plasmon Polaritons

This study theoretically investigated light reflection and transmission in a system composed of a thin metal layer (Ag) adjacent to a rugate filter (RF) having a harmonic refractive index profile. Narrow dips in reflectance and peaks in transmittance in the RF band gap were obtained due to the excitation of a Tamm plasmon polariton (TPP) at the Ag–RF interface. It is shown that the spectral position and magnitude of the TPP dips/peaks in the RF band gap depend on the harmonic profile parameters of the RF refractive index, the metal layer thickness, and the external medium refractive index. The obtained dependences for reflectance and transmittance allow selecting parameters of the system which can be optimized for various applications.

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