Abstract-Design, fabrication, and demonstration of a dielectric vortex waveguide in the sub-terahertz region

Nafiseh Aflakian, Tim P. LaFave, K. O. Kenneth, Solyman Ashrafi, and Duncan L. MacFarlane

https://www.osapublishing.org/ao/abstract.cfm?uri=ao-56-25-7123&origin=search

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.

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