title: Generation of Bessel beams using a magnetic liquid deformable mirror.
abstract: A deformable mirror made of a magnetic liquid has been used to produce conical surfaces with subwavelength (λ/4) accuracy. The surface profile of the liquid mirror is controlled by 91 small magnetic coils. The mirror exhibits a linear response with respect to the currents driving the coils, and it allows for real-time changes of its surface profile. The magnetic liquid deformable mirror has been used to produce reflected beams having a conical wavefront; the propagation of the reflected beams was verified to be consistent with that of Bessel beams in the near and far field. The large dynamic range of such a deformable mirror has made it possible to generate Bessel beams with a broad range of beam parameters.
authors.affiliation: Center for Optics, Photonics and Lasers (COPL), Laval University, Quebec, Canada, G1V 0A6. denis.brousseau@copl.ulaval.ca
authors.forename: Denis
authors.initials: D
authors.lastname: Brousseau
authors.forename: Julie
authors.initials: J
authors.lastname: Drapeau
authors.forename: Michel
authors.initials: M
authors.lastname: Piché
authors.forename: Ermanno F
authors.initials: EF
authors.lastname: Borra