About: http://webisa.webdatacommons.org/268840569

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	IntroductionBeams with helical phase fronts, characterized by an azimuthal phase term exp(il??) possess an orbital angular momentum of l?? per photon [1], where ?? is the azimuthal angle and l is an integer.
http://www.w3.org/ns/prov#wasQuotedFrom	osapublishing.org