Abstract:
:Wave retarders having spatially varying optical axes orientations, called q-plates are extremely efficient devices for converting spin to orbital angular momentum of light and for the generation of optical vortices. Most often, these plates are designed for a specific wavelength and have a homogeneous constant retardance. The present work provides a polarimetric approach for overcoming both these limitations. We theoretically propose and experimentally demonstrate q-plates with tunable retardance, employing a combination of only standard q-plates and waveplates. A clear prescription is provided for realizing wavelength indepedent q-plates for a desired retardance, with a potential for ultrafast switching. Apart from the potential commercial value of the proposed devices, our results may find applications in quantum communication protocols, astronomical coronography, angular momentum sorting and in schemes that leverage optical vortices and spin to orbital angular momentum conversion.
journal_name
Sci Repjournal_title
Scientific reportsauthors
B R,Kadiri G,Raghavan Gdoi
10.1038/s41598-019-48163-8subject
Has Abstractpub_date
2019-08-15 00:00:00pages
11911issue
1issn
2045-2322pii
10.1038/s41598-019-48163-8journal_volume
9pub_type
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