Bovino, Fabio Antonio Braccini, Matteo Giardina, Maurizio Sibilia, Concita Media 1: Orbital angular momentum in noncollinear second-harmonic generation by off-axis vortex beams Originally published in JOSA B on 01 November 2011 (josab-28-11-2806) Orbital;JOSA B;noncollinear second-harmonic generation;media;01 November 2011;momentum;josab;off-axis vortex beams 2011-11-01
    https://opticapublishing.figshare.com/articles/media/Media_1_Orbital_angular_momentum_in_noncollinear_second-harmonic_generation_by_off-axis_vortex_beams/4917842
10.1364/JOSAB.28.002806.m001