Analysis of multiple reflections in hybrid photonic crystal multimode interference coupler |
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Authors: | Mohd Hanapiah M Yusoff H Abu Hassan MR Hashim MK Abd-Rahman |
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Institution: | aSchool of Physics, Universiti Sains Malaysia, 11800 USM Penang, Malaysia;bFaculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Malaysia |
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Abstract: | In this paper the analysis of multiple reflections in photonic crystal (PhC) multimode interference (MMI) couplers using eigen-mode expansion method is presented. The analysis is conducted on a hybrid PhC structure which consisted of 1-D PhC multimode waveguide sandwiched between 2-D PhC input/output waveguides. In PhC multimode waveguide, where the mechanism of wave confinement is not due to total internal reflection but due to photonic bandgap properties, the reflectivity at 2-D PhC facet wall would be very large for all the guided modes in the waveguide when ever the image formed due to MMI effect does not coincides with the output access waveguide. |
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Keywords: | Photonic crystals waveguides Multimode interference Multiple reflections Eigen-mode expansion method |
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