Of the knot but not the knot
1. Isolated optical vortex knots. Authors: Mark R. Dennis, Robert P. King, Barry Jack, Kevin O’Holleran, and Miles J. Padgett Nature Physics 6, 118 (2009) Recommended with a commentary by Randall D. Kamien, University of Pennsylvania |View Commentary (pdf)| DOI: 10.36471/JCCM_September_2010_03 https://doi.org/10.36471/JCCM_September_2010_03