简介：Ahigh-efficiencytechniqueforopticalvortex(OV)generationisproposedanddemonstrated.Thetechniqueisbasedonliquidcrystalforkgratingswithspace-variantazimuthalorientations,whicharelocallycontrolledviapolarization-sensitivealignmentlayers.Thankstotheopticalrewritabilityofthealignmentagentandthedynamicimagegenerationofthedigitalmicro-mirrordevice,forkgratingscanbeinstantlyandarbitrarilyreconfigured.Correspondingopticalvorticescarryingarbitraryazimuthalandradialindicesaredemonstratedwithaconversionefficiencyof98.5%,exhibitingfeaturesofpolarizationcontrolandelectricalswitching.ThetechniquemaypaveabrightroadtowardOVgeneration,manipulation,anddetection.
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