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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/65436

    Title: Efficient omnidirectional couplers achieved by anisotropic photonic crystal waveguides
    Authors: Liu, Cheng-Yang
    Contributors: 淡江大學機械與機電工程學系
    Keywords: Coupler;Anisotropic photonic crystal;Coupling length
    Date: 2009-08
    Issue Date: 2013-07-09 15:31:59 (UTC+8)
    Publisher: Amsterdam: Elsevier BV * North-Holland
    Abstract: Photonic crystals (PCs) have many potential applications because of their ability to control light-wave propagation. We have investigated omnidirectional couplers in two-dimensional anisotropic PC structures. The anisotropic PC coupler composed of an anisotropic-dielectric cylinder in air is studied by solving Maxwell's equations using the plane wave expansion method and finite-difference time-domain method. The photonic band structures are found to exhibit absolute bandgaps for the square lattices. Numerical simulations show that the incident light-waves at both transverse electric and transverse magnetic modes have efficient coupling in anisotropic PC coupler with square lattices. The guided modes and coupling length are analyzed by considering various line defect anisotropic PC waveguides and interaction regions of couplers. Such a mechanism of omnidirectional coupling should open up a new application for designing components in photonic integrated circuits.
    Relation: Physics Letters. Section A: General, Atomic and Solid State Physics 373(34), pp.3061-3066
    DOI: 10.1016/j.physleta.2009.06.039
    Appears in Collections:[機械與機電工程學系暨研究所] 期刊論文

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