WereportontheexperimentalrealizationofCerenkovsum-frequencygenerationacrossthematerialdispersioninaone-dimensional,periodicallypoledferroelectriccrystal.Threeschemesofsum-frequencygeneration,confinedonlyinthevicinityofdomainwallsandintheformofnonlinearCerenkovradiation,aredemonstratedinnormal,degenerated,andanomalous-dispersion-likeconfigurations.Weexploittheirphase-matchinggeometries,whichexhibitawholescenariooftheevolutionofCerenkovradiationvaryingwiththedispersionrelationshipamongtheinteractionwaves.Inaddition,twosetsofconicalsum-frequencygenerationwithdifferentradiusandcenteraredemonstrated,whichresultfromscatteringassistantphase-matchingprocesses.
