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Volume 26 - ICOP & ICPET 2020
ICOP & ICPET _ INPC _ ICOFS 2020, 26 - ICOP & ICPET 2020: 281-284 |
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Bagher F, Rezvani jalal M. Dispersion Relation of a Photonic Crystal in a Cylindrical Waveguide. ICOP & ICPET _ INPC _ ICOFS 2020; 26 :281-284
URL: http://opsi.ir/article-1-2037-en.html
URL: http://opsi.ir/article-1-2037-en.html
1- Photonic Group, Department of Physics, Malayer University, Malayer
Abstract: (1813 Views)
In this paper, interaction of light with a piece of photonic crystal placed in a cylindrical waveguide with conductive walls is studied both analytically and computationally. First, the propagating modes in the waveguide (with square cross-section) and its dispersion relation is mentioned. Then, reflection and transmission coefficients from periodic index layers (i.e. a photonic crystal) within the waveguide are analytically found by the matrix optics. After finding the transmission coefficient and comparing it with that in free space, the effect of waveguide on the dispersion relation of photonic crystal is revealed. These two dispersion relations are the same for frequencies much larger than the cut-off frequency but they have distinct differences for frequencies near to it.
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