title: Integer and fractional angular momentum borne on self-trapped necklace-ring beams.
abstract: We present self-trapped necklace-ring beams that carry and conserve angular momentum. Such beams can have a fractional ratio of angular momentum to energy, and they exhibit a series of phenomena typically associated with rotation of rigid bodies and centrifugal force effects.
authors.affiliation: Physics Department, MIT, Cambridge, Massachusetts 02139, USA.
authors.forename: M
authors.initials: M
authors.lastname: Soljacić
authors.forename: M
authors.initials: M
authors.lastname: Segev