Low cross-talk polarization splitter based on photonic crystal waveguide with tunable air hole arrays

摘要

Weproposedandnumericallyinvestigatedanoveltwo-dimensional(2D)photoniccrystal(PhC)-basedpolarizationsplitter.ItwasdemonstratedthatbyintroducingsingleairholedefectintothePhCstructure,alowcross-talkpolarizationsplittercanberealizedwithsignificantlyminimizedreflectionoccurringattheinterfacebetweenthedielectricmaterialandair.Foranoperatingwavelengthof1.55micro;m,anextinctionratiohigherthan15dBhasbeenachievedinthisstudy.Thelowcross-talkfeaturetogetherwiththehightoleranceofthevariationinthesizeoftheairholearraysmakethedeviceproposedsuitablefortheintegratedopticalcircuits.