title: Ultraviolet vortex generation using periodically bonded β-BaB₂O₄ device.
abstract: This paper describes the first demonstration of ultraviolet (266nm) vortex generation using the combination of a frequency-doubled nanosecond green laser, a spiral phase plate, and a periodically bonded β-BaB2O4 device. For a laser pumping energy of 9.1 mJ, an ultraviolet vortex energy of 1.24 mJ was obtained, corresponding to a conversion efficiency of 13.7%.
authors.forename: Yuta
authors.initials: Y
authors.lastname: Sasaki
authors.forename: Mio
authors.initials: M
authors.lastname: Koyama
authors.forename: Katsuhiko
authors.initials: K
authors.lastname: Miyamoto
authors.forename: Yoshimi
authors.initials: Y
authors.lastname: Ariga
authors.forename: Tomomi
authors.initials: T
authors.lastname: Onda
authors.forename: Ichiro
authors.initials: I
authors.lastname: Shoji
authors.forename: Takashige
authors.initials: T
authors.lastname: Omatsu