scholarly journals COMPARISON OF FUNDAMENTAL SPACE-FILLING MODE INDEX, EFFECTIVE INDEX AND THE SECOND AND THIRD ORDER DISPERSIONS OF PHOTONIC CRYSTALS FIBERS CALCULATED BY SCALAR EFFECTIVE INDEX METHOD AND EMPIRICAL RELATIONS METHODS

2008 ◽  
Vol 1 ◽  
pp. 197-206 ◽  
Author(s):  
Ali Pourkazemi ◽  
Mojtaba Mansourabadi
Keyword(s):  
Photonic Crystals ◽  
Effective Index ◽  
Space Filling ◽  
Third Order ◽  
Index Method ◽  
Effective Index Method ◽  
Mode Index ◽  
Empirical Relations

scholarly journals Theoretical Analysis of Terahertz Dielectric–Loaded Graphene Waveguide

Nanomaterials ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 210
Author(s):  
Da Teng ◽  
Kai Wang
Keyword(s):  
Photonic Devices ◽  
Effective Index ◽  
The Finite Element Method ◽  
Index Method ◽  
Modal Properties ◽  
Terahertz Region ◽  
Effective Index Method ◽  
Integration Density ◽  
Device Integration ◽  
Potential Applications

The waveguiding of terahertz surface plasmons by a GaAs strip-loaded graphene waveguide is investigated based on the effective-index method and the finite element method. Modal properties of the effective mode index, modal loss, and cut-off characteristics of higher order modes are investigated. By modulating the Fermi level, the modal properties of the fundamental mode could be adjusted. The accuracy of the effective-index method is verified by a comparison between the analytical results and numerical simulations. Besides the modal properties, the crosstalk between the adjacent waveguides, which determines the device integration density, is studied. The findings show that the effective-index method is highly valid for analyzing dielectric-loaded graphene plasmon waveguides in the terahertz region and may have potential applications in subwavelength tunable integrated photonic devices.

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