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Volume 26 - ICOP & ICPET 2020
ICOP & ICPET _ INPC _ ICOFS 2020, 26 - ICOP & ICPET 2020: 861-864 |
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Kakoolaki N, Hassanzadeh A. Coupling coefficients of a thin-film waveguide grating based on metamaterial. ICOP & ICPET _ INPC _ ICOFS 2020; 26 :861-864
URL: http://opsi.ir/article-1-2224-en.html
URL: http://opsi.ir/article-1-2224-en.html
1- Department of Physics, University of Kurdistan, Sanandaj, Iran
Abstract: (1682 Views)
We study the propagation of waves in a new dielectric slab waveguide grating with metamaterial cover. Perturbation theory is used to derive an expression that approximates the transverse coupling coefficient for coupling between deferent Transverse Magnetic (TM)-polarized guided modes in a waveguide with a rectangular grating. We numerically obtain the coupling coefficient of waveguide gratings with a double negative cover and compare with that of conventional waveguides, then we report the unusual properties of this structure. We show that the coupling coefficient of the fundamental mode is disappeared. Also the magnitude of the left-handed waveguide gratings enhances more than one order of magnitude.
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