标签: formalism

applicationoftheimpedanceformalismtodiffractiongratingswithmultiplecoatinglayersApplicationoftheimpedanceformalismtodiffractiongratingswithmultiplecoatinglayersAnandaK.CousinsandS.C.GottschalkThestandardmethodofmatchingboundaryconditionsattheinterfacesofamultilayerplanedielectricstackisolateddielectricstackwithanincidentpropagatingbeamthereisnoneedtocalculatetheevanescentorders;however,whenadiffractiongratingisburiedunderthestackthereismixingoforders,anditmaybeimportanttocalculatetheevanescentaswellasthepropagatingorders.Itisshownthattheimpedanceformalismremovesthenumericalinstabilitycompletely.Thismethodmaybecoupledtoeitherboundaryintegralordifferentialequationmethodsforthegratingtoprovidethecompletesolutionforthegrating-stacksystem.isshowntoben……