title: Three-dimensional coherent optical waves localized on trochoidal parametric surfaces.
abstract: We theoretically demonstrate that the three-dimensional (3D) coherent laser waves formed by the degenerate Laguerre-Gaussian modes with different longitudinal indices are well localized on rotating trochoidal parametric surfaces. We further use a large-Fresnel-number laser system to realize the existence of the laser modes related to trochoidal coherent states. Experimental results reveal that the exotic laser modes generally originate from a superposition of two degenerate standing-wave trochoidal coherent states.
authors.affiliation: Department of Electrophysics, National Chiao Tung University, Hsinchu, Taiwan.
authors.forename: T H
authors.initials: TH
authors.lastname: Lu
authors.forename: Y C
authors.initials: YC
authors.lastname: Lin
authors.forename: Y F
authors.initials: YF
authors.lastname: Chen
authors.forename: K F
authors.initials: KF
authors.lastname: Huang