title: Experimental study of holographic generation of fractional Bessel beams.
abstract: We demonstrate the experimental generation of a fractional Bessel beam by holographic means. Such fractional modes of Bessel beams possess an intrinsic opening gap across concentric intensity rings on propagation. We also show that the opening gaps within the fractional modes are diffraction free for a working distance while a fractional helical wave front is maintained.
authors.affiliation: Photonics Research Centre, School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798.
authors.forename: Shao Hua
authors.initials: SH
authors.lastname: Tao
authors.forename: Woei Ming
authors.initials: WM
authors.lastname: Lee
authors.forename: Xiaocong
authors.initials: X
authors.lastname: Yuan