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The finite-difference time-domain (FDTD) method is employed to analyze the tolerance of the radius of the defected cylinder within periodical dielectric waveguide (PDWG). The optical transmission is very sensitive to the radius of the defected cylinder. It shows that the tolerance of the radius of defected cylinder within PDWG is not good.
In this paper, we analyzed the transmission characteristics of the point-defected around the outer layers of 90-degree bend photonic crystal. The simulation results show the vertical and horizontal point-defects have much effect than slanted ones.
Several types of T-junction composite waveguides, which comprises a ridge waveguide and some square-lattice dielectric cylinders around the intersection region, are investigated. And FDTD simulation results describe their respective transmissions.
The finite-difference time-domain (FDTD) method is utilize to analyze the point-vacancy periodical dielectric waveguide (point-vacancy PDWG). It is found that the optical guidance is not seriously affected by one missing cylinder.
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