Abstract

Initial three-dimensional phase and intensity measurements of a 100 GHz $l=\pm 1$ orbital angular momentum (OAM) vortex are presented. The vortex was generated by illuminating a polypropylene spiral phase plate. Measurements were taken with a three-dimensional field scanner operating in the W-band (75–100 GHz). Early analysis shows splitting of the OAM phase dislocation at the vortex center, resulting in a complex inner vortex intensity pattern.

© 2014 Optical Society of America

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