Design of optical band pass filter based on photonic crystal with resonance cavity
Recently, regarding the performance of photonic crystal band-pass filters in optical networks connection, optical integrated circuits, and short wavelength with high frequency, has attracted a lot of attention. In this paper, Our goal is designing a new type of photonic crystal band-pass filters using a waveguide cavity in the form of reduction in size of the cell, that as a result we create a filter in the function of the urban wavelength with an acceptable bandwidth. Here, two types of filters have been used and optimized that the operation has been conducted by Rsoft software and FDTD two-dimensional technique. The first method is the reduction of the size of cells in waveguide and elimination of some cells in the same direction. The second method is the elimination of two cells in the vicinity of waveguide in the center of the structure. Numerical results show that the light in a band around 1.550 um passes through with maximum value. The efficiency has increased more than the previous structures, it is about 80%.
 S. Xiao, L. Liu, and M. Qiu, "Resonator channel drop filters in a plasmon-polaritons metal," Optics Express, vol. 14, pp. 2932-2937, 2006/04/03 2006.
 H. Ren, C. Jiang, W. Hu, M. Gao, and J. Wang, "Photonic crystal channel drop filter with a wavelength-selective reflection micro-cavity," Optics Express, vol. 14, pp. 2446-2458, 2006/03/20 2006.
 H. Alipour-Banaei and F. Mehdizadeh, "Significant role of photonic crystal resonant cavities in WDM and DWDM communication tunable filters," Optik - International Journal for Light and Electron Optics, vol. 124, pp. 2639-2644, 9// 2013.
 N. Panoiu, M. Bahl, and J. R. Osgood, "All-optical tunability of a nonlinear photonic crystal channel drop filter," Optics Express, vol. 12, pp. 1605-1610, 2004/04/19 2004.
 S. Robinson and R. Nakkeeran, "Investigation on two dimensional photonic crystal resonant cavity based bandpass filter," Optik - International Journal for Light and Electron Optics, vol. 123, pp. 451-457, 3// 2012.
 C. Chen, X. Li, H. Li, K. Xu, J. Wu, and J. Lin, "Bandpass filters based on phase-shifted photonic crystal waveguide gratings," Optics Express, vol. 15, pp. 11278-11284, 2007/09/03 2007.
 B. Hadjira, F. Mohammed, and A. Mehadji, "Photonic-Crystal Band-pass Resonant Filters Design Using the Two-dimensional FDTD Method," International Journal of Computer Science Issues, vol. 8, pp. 127-132, 2011.
 C.-p. Yu and H.-c. Chang, "Compact finite-difference frequency-domain method for the analysis of two-dimensional photonic crystals," Optics Express, vol. 12, pp. 1397-1408, 2004/04/05 2004.
 C.-P. Yu and H.-C. Chang, "Yee-mesh-based finite difference eigenmode solver with PML absorbing boundary conditions for optical waveguides and photonic crystal fibers," Optics Express, vol. 12, pp. 6165-6177, 2004/12/13 2004.