title: q-plate for millimeter-wave orbital angular momentum manipulation.
abstract: q-plates are quasi-optical devices specifically designed to generate and detect the orbital angular momentum states of the light. It is possible to produce q-plates working at millimeter wavelengths by using a well-known and cheap manufacturing technique. The technique consists of creating inhomogeneous, artificial birefringent materials by machining grooves with specific geometries into normal dielectric materials. In this work, a q-plate working around 100 GHz has been designed, manufactured, and tested using a vector network analyzer. The experimental data validate the modeled intensity and phase for the transformation of an incident Gaussian beam.
authors: Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, University of Manchester, Manchester, UK. Stefania.Maccalli@postgrad.manchester.ac.uk
authors: Stefania
authors: S
authors: Maccalli
authors: Giampaolo
authors: G
authors: Pisano
authors: Sergio
authors: S
authors: Colafrancesco
authors: Bruno
authors: B
authors: Maffei
authors: Ming Wah Richard
authors: MW
authors: Ng
authors: Malcolm
authors: M
authors: Gray