q-plate for millimeter-wave orbital angular momentum manipulation

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 inhomogen...

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Bibliographic Details
Published in:Applied optics (2004) 2013-02, Vol.52 (4), p.635-639
Main Authors: Maccalli, Stefania, Pisano, Giampaolo, Colafrancesco, Sergio, Maffei, Bruno, Ng, Ming Wah Richard, Gray, Malcolm
Format: Article
Language:English
Subjects:
Angular momentum
Gaussian beams (optics)
Grooves
Mathematical analysis
Orbitals
Transformations
Vectors (mathematics)
Wavelengths
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Summary: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.
ISSN:1559-128X
2155-3165
DOI:10.1364/AO.52.000635