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Optica Publishing Group
  • Chinese Optics Letters
  • Vol. 10,
  • Issue 1,
  • pp. 011301-
  • (2012)

Optimization of T-shaped waveguide branches in two-dimensional photonic crystals

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Abstract

The interval and the radius of a pair of defect dielectric rods in waveguide channels near the branching region of a T-shaped waveguide branches are simultaneously varied, and their effects on the transmission properties are investigated using the finite-difference time-domain (FDTD) method. Numerical results show that there is an optimized region where the relative bandwidth of high-transmission (total transmittance >0.95) band of the branches is larger than 17%, which is higher than that of the existing same structures (11.60%) with fixed interval. These results provide for engineering application of simple T-shaped waveguide branches with high transmission.

© 2012 Chinese Optics Letters

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