Strongnonlinear,electro-optical,andthermo-opticalpropertiesoflithiumniobate（LN）havegainedmuchattention.However,theimplementationofLiNbO3inrealdevicesisnotatrivialtaskduetodifficultiesinmanufacturingandhandlingthin-filmLN.Inthisstudy,weinvestigateanopticaldevicewheretheBlochsurfacewave（BSW）propagatesonthethin-filmLNtounlockitsproperties.First,accesstotheLNfilmfromair（oropenspace）isimportanttoexploititsproperties.Second,forsustainingtheBSW,one-dimensionalphotoniccrystal（1DPhC）isnecessarytobefabricatedunderthethin-filmLN.Weconsidertwomaterialplatformstorealizesuchadevice:bulkLNandcommercialthin-filmLN.Clearreflectancedipsobservedinfar-fieldmeasurementsdemonstratethepropagationofBSWsontopoftheLNsurfaceofthedesigned1DPhCs.
