Abstract
A sub-terahertz vortex dielectric waveguide was designed and fabricated in the cyclic olefin copolymer (TOPAS) compound. The annular index profile was engineered using a holey cladding to support operation from approximately 200–300 GHz. The vortex waveguide was tested at 280 GHz using an OAM-endowed Laguerre–Gaussian mode generated by a stepped spiral phase plate.
© 2017 Optical Society of America
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