TY - JOUR AU - K. Dholakia AU - N. Simpson AU - M. Padgett AU - L. Allen BT - Physical Review A DA - Jan-11-1996 DO - 10.1103/PhysRevA.54.R3742 PY - 1996 SP - R3742 EP - R3745 T2 - Physical Review A TI - Second-harmonic generation and the orbital angular momentum of light UR - http://link.aps.org/doi/10.1103/PhysRevA.54.R3742 VL - 54 SN - 1050-2947 ER -