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

Nafiseh Aflakian; Tim P LaFave; K O Kenneth; Solyman Ashrafi; Duncan L MacFarlane

doi:10.1364/AO.56.007123

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

Appl Opt. 2017 Sep 1;56(25):7123-7129. doi: 10.1364/AO.56.007123.

Authors

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

PMID: 29047972
DOI: 10.1364/AO.56.007123

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.