Götte, J. B. Max Planck Institute for the Physics of Complex Systems, Max Planck Society;
Dennis, M. R., & Götte, J. B. (2012). Topological Aberration of Optical Vortex Beams: Determining Dielectric Interfaces by Optical Singularity Shifts. Physical Review Letters, 109(18): 183903. doi:10.1103/PhysRevLett.109.183903.