title: Collinear superposition of multiple helical beams generated by a single azimuthally modulated phase-only element.
abstract: We propose a highly efficient approach to generating multihelix beams that contain more than one helical mode, and the power distribution over helical modes is adjustable. A multihelix beam embedded with three collinear helical modes is demonstrated by use of a spatial light modulator.
authors.affiliation: Photonics Research Centre, School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798.
authors.forename: J
authors.initials: J
authors.lastname: Lin
authors.forename: X C
authors.initials: XC
authors.lastname: Yuan
authors.forename: S H
authors.initials: SH
authors.lastname: Tao
authors.forename: R E
authors.initials: RE
authors.lastname: Burge