Detailed investigation of self-imaging in multimode photonic crystal waveguides for applications in power and polarization beam splitters |
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| Authors: | Naceur Saidani Walid Belhadj Fathi AbdelMalek Habib Bouchriha |
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| Affiliation: | 1. Faculté des Sciences de Bizerte, Zarzouna 7021, Bizerte, Tunis, Tunisia;2. Department of Physics, Jazan University, Saudi Arabia;3. Laboratoire de Physique Quantique et Photonique, Faculte des Sciences de Tunis, BP 1060 Cedex, Tunis, Tunisia;1. Department of Computer Application Engineering, Far East University, Tainan, Taiwan, ROC;2. Department of Energy Application Engineering, Far East University, Tainan, Taiwan, ROC;3. Graduate School of Mechanical Engineering, Far East University, Tainan, Taiwan, ROC;1. College of Science, Shandong University of Science and Technology, Qingdao 266590, China;2. School of Physics, Shandong University, Jinan 250100, China;3. School of Information Science and Engineering, Shandong University, Jinan 250100, China |
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| Abstract: | Properties of the self-imaging effect based on multimode interference (MMI) in multimode photonic crystal waveguides (PCWs) are investigated and analyzed in detail. By combining photonic band gap (PBG) and total internal reflection (TIR) effects in PCWs, self-imaging phenomena are achieved for both TE and TM polarizations. To observe the images reproduced by this self-imaging phenomenon, finite-difference time-domain (FDTD) simulations are performed on a multi-mode PCW. From these numerical simulations the reproduced images are identified and their positions along the propagation axis are described. We also, present the design and simulation of novel polarization-insensitive power splitter and polarization splitter. The simulation results show that the optimized devices have excellent transmission efficiencies as well as wide operating frequency bandwidths and small structure size. So, the proposed devices are promising and may play an important role in high-density photonic integrated circuits in the future. |
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