Design and Analysis of a Novel Hexagonal Shaped Channel Drop Filter Based on Two-Dimensional Photonic Crystals
الموضوعات : فصلنامه نانوساختارهای اپتوالکترونیکیEsmat Rafiee 1 , Farzin Emami 2
1 - Optoelectronic Research Center, Electronic Department, Shiraz University of Technology, Shiraz, Iran
2 - Optoelectronic Research Center, Electronic Department, Shiraz University of Technology, Shiraz, Iran
الکلمات المفتاحية: Photonic Crystal, Photonic Band Gap, Channel drop filter, Hexagonal shaped structure,
ملخص المقالة :
In this paper a new optical channel drop filter (CDF) based on two dimensional (2-D) photonic crystals (PhC) with hexagonal shaped structure is proposed and numerically demonstrated by using the finite-difference-time-domain (FDTD) and plane-wave-expansion (PWE) techniques. Photonic crystals (PhCs) are artificial dielectric nanostructure materials in which a periodic modulation of the material dielectric constant results in a photonic band gap (PBG). By employing defects in the photonic crystals, light can steer in specific direction and consequently in the most of PhC applications, defects are used in their structures. The proposed structure is consisted of two series hexagonal shaped rings of Si rods between two straight waveguides to improve the performance of the channel drop filter. By analyzing the proposed structure, wide ranges of TE photonic band gap (PBG) would be achieved. It will be indicated that the proposed channel drop filter has appropriate characteristics and can be used in future WDM communication systems.
[1] W. Rao , Y. Song, M. Liu, Ch. Jin, All-optical switch based on photonic crystal microcavity with multi-resonant modes, Optik, 121 (2010) 1934-1936.
[2] B.D. Darki, Improving the performance of a photonic crystal ring-resonator-based channel drop filter using particle swarm optimization method, Opt. Commun., 283 (2010) 4099-4103.
[3] H.S. Kim, T.K. Lee, G.Y. Oh, D.G. Kim, Y.W. Choi, Analysis of all optical logic gate based on photonic crystals multimode interference, SPIE F, 1 (2010) 76060– 76061.
[4] M. Mehrabi, J. Barvestani, Localized photonic modes in photonic crystal heterostructures, Opt. Commun., 284 (2011) 5444-5447.
[5] N. Zhu, et al., Photonic band gap failure in photonic crystal devices, Optik., 122 (2011) 1625–1627.
[6] X. Chen, Z. Qiang, D. Zhao, Y. Wang, Polarization beam splitter based on photonic crystal self collimation Mach-Zehnder interferometer, Opt. Commun., 284 (2011) 490– 493.
[7] B. Liu, H. Tian, H. Lu, Y. Ji, Nonlinearity-controllable all-optical logic gates based on broadband defect mode, Optica Applicata XL., 3 (2010) 657–668.
[8] M. A. Mansouri-Birjandi, M. Ghadrdan, All-optical ultra compact photonic crystal switch based on nonlinear micro ring resonators, Int. Res. J. Appl. Basic Sci., 4 (2013) 972–975.
[9] N. Zhu, L. Xu, Research on slow light for slotted photonic crystal waveguide with mixed dielectric constant, Optik, 124 (2013) 2817-2820.
[10] T. Uthayakumar, Designing a class of asymmetric twin core photonic crystal fibers for switching and multi-frequency generation, Opt. Fiber Tech., 19 (2013) 556-564.
[11] E. Rafiee, F. Emami, N. Nozhat, Coupling coefficient increment and free spectral range decrement by proper design of microring resonator parameters, Opt. Eng., 53 (2014) 123108.
[12] E. Rafiee, F. Emami, Investigating the effects of structural parameters on the optical characteristics of add-drop filters, Optik, 127 (2016) 1690-1694.
[13] Z. Hu, H. Wu, Temporal response and reflective behaviors in all-optical switch based on InAs/GaAs one-dimensional quantum-dot resonant photonic crystal, Opt. Commun., 228 (2013) 76-81.
[14] L. Li, G.Q. Liu, Photonic crystal ring resonator channel drop filter, Optik, 124 (2013) 2966-2968.
[15] S. Feng, Y. Weng, Unidirectional wavelength filtering characteristics of the two-dimensional triangular-lattice photonic crystal structures with elliptical defects, Opt. Mat., 35 (2013) 2166-2170.
[16] A. Mehr, F. Emami, Tunable photonic crystal filter with dispersive and non-dispersive chiral rods, Opt. Commun., 301-302 (2013) 88-95.
[17] M. Y. Mahmoud, A new optical add–drop filter based on two-dimensional photonic crystal ring Resonator, Optik, 124 (2013) 2864– 2867.
[18] M. Y. Mahmoud, G. Bassou, Channel drop filter using photonic crystal ring resonators for CWDM communication systems, Optik, 125 (2014) 4718–4721.
[19] K. Goodarzi, A. Mir, Design and analysis of an all-optical Demultiplexer based on photonic Crystals, Inf. Phy. & Tech., 68 (2015) 193–196.
[20] S.G. Johnson, J.D. Joannopoulos, Block-iterative frequency-domain methods for Maxwell’s equations in a plane wave basis, Opt. Express., 8 (2001) 173–190.
[21] A. Taflove, S.C. Hegnese, Computational Electrodynamics: The Finite-Difference Time-Domain Method, Artech House : Boston, MA, 1998.
