Ultra-wideband optical diode based on photonic crystal 90° bend and directional coupler

(整期优先)网络出版时间:2014-10-20
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Weproposeanultra-widebandopticaldiodedevicebasedontwo-dimensionalsquare-latticephotoniccrystals.Forthedevice,theoddmodeiscompletelytransmittedinonedirectionandconvertedtothefundamentalevenmode,butcompletelyreflectedintheotherdirection.Theoperationbandwidthofthedeviceispreservedwithinaratherwiderangeoffrequencies,whichisover6.5%ofthecentralfrequency.Adirectionalcouplerand90°bendareutilizedasthecompositefunctiondevicewithmodefilterandmodeconverter.Itispossiblethatthephotoniccrystaldevicecanhelptoconstructon-chipopticallogicaldevicesandbenefitgreatlytotheopticalsystemswithmultiplespatialmodes.更多还原