title: Synthesis of multiple collinear helical modes generated by a phase-only element.
abstract: Phase-only elements are generally more desirable than complex-amplitude-modulated elements not only because of the higher diffraction efficiency but the readier implementation and fabrication. A novel iterative algorithm is proposed for generating multiple helical modes by a single phase-only element. A superposition of four helical modes is demonstrated experimentally by using a spatial light modulator.
authors.affiliation: Photonics Research Centre, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore.
authors.forename: Jiao
authors.initials: J
authors.lastname: Lin
authors.forename: Xiaocong
authors.initials: X
authors.lastname: Yuan
authors.forename: Shaohua H
authors.initials: SH
authors.lastname: Tao
authors.forename: Ronald E
authors.initials: RE
authors.lastname: Burge