Journal of the Optical Society of Korea

Optical Society of Korea (한국광학회)
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Directional Emission from Photonic Crystal Waveguide Output by Terminating with CROW and Employing the PSO Algorithm

  • Bozorgi, Mahdieh (Faculty of Electrical and Computer Engineering, K. N. Toosi University of Technology) ;
  • Granpayeh, Nosrat (Faculty of Electrical and Computer Engineering, K. N. Toosi University of Technology)
  • Received : 2011.03.21
  • Accepted : 2011.05.03
  • Published : 2011.06.25
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Abstract

We have designed two photonic crystal waveguide (PCW) structures with output focused beams in order to achieve more coupling between photonic devices and decrease the mismatch losses in photonic integrated circuits. PCW with coupled resonator optical waveguide (CROW) termination has been optimized by both one dimensional (1D) and seven dimensional (7D) particle swarm optimization (PSO) algorithms by evaluating the fitness function by the finite difference time domain (FDTD) method. The 1D and 7D-optimizations caused the factors of 2.79 and 3.875 improvements in intensity of the main lobe compared to the non-optimized structure, whereas the FWHM in 7D-optimized structure was increased, unlike the 1D case. It has also been shown that the increment of focusing causes decrement of the bandwidth.

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References

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